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WO2024168652A1 - Digital twin of a spectacle lens and spectacle lens - Google Patents

Digital twin of a spectacle lens and spectacle lens Download PDF

Info

Publication number
WO2024168652A1
WO2024168652A1 PCT/CN2023/076348 CN2023076348W WO2024168652A1 WO 2024168652 A1 WO2024168652 A1 WO 2024168652A1 CN 2023076348 W CN2023076348 W CN 2023076348W WO 2024168652 A1 WO2024168652 A1 WO 2024168652A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring
shaped
structures
equal
larger
Prior art date
Application number
PCT/CN2023/076348
Other languages
French (fr)
Inventor
Ouyang LIU
Songjin ZHANG
Jester PHILIPP
Original Assignee
Carl Zeiss Vision International Gmbh
Carl Zeiss Vision Technical Service (Guangzhou) Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carl Zeiss Vision International Gmbh, Carl Zeiss Vision Technical Service (Guangzhou) Ltd. filed Critical Carl Zeiss Vision International Gmbh
Priority to PCT/CN2023/076348 priority Critical patent/WO2024168652A1/en
Priority to PCT/EP2024/054080 priority patent/WO2024170781A1/en
Publication of WO2024168652A1 publication Critical patent/WO2024168652A1/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/021—Lenses; Lens systems ; Methods of designing lenses with pattern for identification or with cosmetic or therapeutic effects
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/022—Ophthalmic lenses having special refractive features achieved by special materials or material structures
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
    • G02C2202/20—Diffractive and Fresnel lenses or lens portions
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
    • G02C2202/24—Myopia progression prevention

Definitions

  • the present invention relates to a digital twin of a spectacle lens according to the preamble claim 1, to a computer-implemented method configured for calculating a digital twin of a spectacle lens according to the preamble of claim 8 and to a spectacle lens according to the preamble of claim 20.
  • WO 2019/166659 A1 discloses a spectacle lens comprising concentric rings, arranged as shown in figure 11b and described on page 20, lines 10 to 12.
  • CN 111103701 A discloses a spectacle lens comprising an annular cylindrical microstructure, arranged as shown in figure 1.
  • the central optical area is circular having a radius of 5 mm to 10 mm, the center of the spectacle lens being the center of the circle.
  • the annular cylindrical microstructure is located outside the central optical area having a radius between the one of the central optical area and 20 mm or more.
  • the radial width of the annular cylindrical microstructures is 0.5 mm to 2 mm.
  • the distance between the different cylindrical microstructure is 0.5 mm to 3 mm.
  • PCT/EP2022/053854 discloses a spectacle lens comprising ring-shaped focusing structures surrounding a central clear zone having a central clear zone width of 6 mm to 9.4 mm.
  • the ring-shaped focusing structures have a width of equal or lower than 0.7 mm.
  • the problem has been solved by the digital twin according to claim 1, the computer-implemented method configured for calculating a digital twin of a spectacle lens according to claim 8 and the spectacle lens according to claim 20.
  • the digital twin of the spectacle lens according to the invention is configured for the purpose of a use of the digital twin for manufacturing the spectacle lens and comprises
  • a surface-based fill factor defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said more ring-shaped structures or of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped structure of said more ring-shaped structures or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a surface area of a peripheral zone, said surface-based fill factor being larger than 17 %and equal or lower than 70%for said uniform width of said more ring-shaped structures or said more ring-shaped diffusing structures in a range of 0.6 mm to 0.7 mm;
  • a surface-based fill factor defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said more ring-shaped structures or of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped structure of said more ring-shaped structures or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a surface area of a peripheral zone, said surface-based fill factor being larger than 15 %and equal or lower than 60%for said uniform width of said more ring-shaped structures or said more ring-shaped diffusing structures in a range of 0.5 mm to 0.6 mm;
  • a surface-based fill factor defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said more ring-shaped structures or of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped structure of said more ring-shaped structures or said an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a surface area of a peripheral zone, said surface-based fill factor being larger than 6 %and equal or lower than 50 %for said uniform width of said more ring-shaped structures or said more ring-shaped diffusing structures lower than 0.5 mm,
  • said digital twin being characterized in comprising at least one second additional feature of the following group of second features:
  • a “digital twin of a spectacle lens” shall be defined analogously as in ISO 13666: 2019 (E) , section 3.5.2 (spectacle lens) , as a digital twin of an ophthalmic lens worn, when transferred in physical reality, in front of, but not in contact with, the eyeball.
  • the digital twin of the spectacle lens is for the purpose of a use of the digital twin for manufacturing the spectacle lens.
  • the digital twin of a spectacle lens is a mathematical description of a front surface of the spectacle lens, a mathematical description of a back surface of the spectacle lens, said mathematical descriptions including a relative orientation of the front surface and the back surface and a refractive index of an optical material between the front surface and the back surface.
  • a front surface of said digital twin of said spectacle lens is defined analogously as in ISO 13666: 2019 (E) , section 3.2.13, as a surface which when said digital twin is transferred in physical reality is intended to be fitted away from the eye.
  • a back surface of said digital twin of said spectacle lens is defined analogously as in ISO 13666: 2019 (E) , section 3.2.14, as a surface which when said digital twin is transferred in physical reality is intended to be fitted nearer to the eye.
  • the digital twin of said spectacle lens is transferred in physical reality by manufacturing said spectacle lens.
  • the refractive index of the optical material included in the mathematical descriptions preferably is a uniform refractive index.
  • the refractive index of the optical material included in the mathematical descriptions preferably is the refractive index the spectacle lens has when the digital twin of the spectacle lens has been transferred in physical reality.
  • the digital twin of the spectacle lens may, for the purpose of a use of the digital twin for manufacturing the spectacle lens, additionally or alternatively, be one of the following:
  • Said analytical description or said analytical model is for the purpose of a use for manufacturing said spectacle lens.
  • Said analytical description or said analytical model preferably is a piecewise representation and comprises (a) a mathematical formula describing a lens surface of a front surface of said spectacle lens not considering one or more ring-shaped structure (s) or not considering one or more rings-shaped diffusing structure (s) , (b) a mathematical formula describing a lens surface of a back surface of said spectacle lens not considering one or more ring-shaped structure (s) or not considering one or more rings-shaped diffusing structure (s) , (c) (i) a piecewise mathematical formula describing one ring-shaped structure or one ring-shaped diffusing structure, in particular a surface, preferably as could be seen in the examples given below in the sense of surface shape, form or topography, aposition and a domain of said one ring-shaped structure or said one ring-shaped diffusing structure or (c) (ii) piecewise
  • said analytical description or said analytical model is a piecewise representation and comprises (a) a mathematical formula or mathematical formulas describing a lens surface of a front surface considering optionally one ring-shaped structure or one ring-shaped diffusing structure or each of more ring-shaped structures or each of more ring-shaped diffusing structures, preferably the mathematical formula (s) describing the lens surface of the front surface inclusive one or more ring-shaped structure (s) or inclusive one or more ring-shaped diffusing structure (s) , (b) a mathematical formula or mathematical formulas describing a lens surface of a back surface considering optionally one ring-shaped structure or one ring-shaped diffusing structure or each of more ring-shaped structures or each of more ring-shaped diffusing structures, preferably the mathematical formula describing the lens surface of the back surface, (c) a mathematical formula describing a relative orientation of the lens surface of the front surface to the lens surface of the back surface, and (d) a mathematical formula describing a refractive index of a digital twin of a
  • an analytical description or an analytical model describing or representing said spectacle lens said analytical description or said analytical model additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure (s) or said one or more ring-shaped diffusing structure (s) ;
  • said analytical description or said analytical model additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure (s) or said one or more ring-shaped diffusing structure (s) ;
  • said analytical description or said analytical model being (i) computer-readable data or (ii) in the form of computer-readable data, said computer-readable data being for the purpose of a use for manufacturing said spectacle lens;
  • said analytical description or said analytical model being (i) computer-readable data or (ii) in the form of computer-readable data, said computer-readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure (s) or said one or more ring-shaped diffusing structure (s) ;
  • said analytical description or said analytical model being for the purpose of a use for manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal.
  • the computer readable storage medium may be a non-transitory tangible computer-readable storage medium;
  • Said numerical data are for the purpose of a use for manufacturing said spectacle lens.
  • Said numerical data preferably are comprising or being a conversion of said analytical description or said analytical model.
  • Said numerical data preferably are comprising a pattern which comprises a) discrete x, y, z positions of or on a front surface of said spectacle lens and b) discrete x, y, z positions of or on a back surface of said spectacle lens.
  • Said pattern comprising discrete x, y positions may be adapted or selected arbitrarily.
  • Said numerical data comprises the function value of the analytical description or the analytical model of said lens surface in each of said discrete x, y positions.
  • each discrete x, y position i.e., the discrete x, y, z positions, of the front and back surface are described in the same coordinate system or a relative orientation of the coordinate systems of the lens front surface and the lens back surface is comprised in said numerical data.
  • a refractive index of an optical material is comprised in said numerical data;
  • said numerical data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure (s) or said one or more ring-shaped diffusing structure (s) ;
  • said numerical data being (i) computer-readable data or (ii) in the form of computer-readable data, said computer-readable data being for the purpose of a use for manufacturing said spectacle lens;
  • said numerical data being (i) computer-readable data or (ii) in the form of computer-readable data, said computer-readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure (s) or said one or more ring-shaped diffusing structure (s) ;
  • the numerical data being for the purpose of a use for manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal.
  • the computer-readable storage medium may be a non-transitory tangible computer-readable storage medium;
  • said computer-readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure (s) or said one or more ring-shaped diffusing structure (s) ;
  • said computer-readable data being for the purpose of a use for manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal.
  • the computer-readable storage medium may be a non-transitory tangible computer-readable storage medium;
  • said spectacle lens in the form of computer-readable data, said computer-readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure (s) or said one or more ring-shaped diffusing structure (s) ;
  • said virtual representation of said spectacle lens being for the purpose of a use for manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal.
  • the computer-readable storage medium may be a non-transitory tangible computer-readable storage medium;
  • said virtual representation of said spectacle lens in the form of computer-readable data being for the purpose of manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal.
  • the computer-readable storage medium may be a non-transitory tangible computer-readable storage medium.
  • a “spectacle lens” results from a transfer of a digital twin of a spectacle lens in physical reality.
  • the digital twin of the spectacle lens is transferred in physical reality by manufacturing the spectacle lens.
  • the spectacle lens is as defined in ISO 13666: 2019 (E) , section 3.5.2, an ophthalmic lens (3.5.1) worn in front of, but not in contact with, the eyeball.
  • a front surface of the spectacle lens is defined as in ISO 13666: 2019 (E) , section 3.2.13, as surface of the spectacle lens intended to be fitted away from the eye.
  • a back surface of the spectacle lens is defined as in ISO 13666: 2019 (E) , section 3.2.14, as surface of the spectacle lens intended to be fitted nearer to the eye.
  • the spectacle lens preferably is a finished spectacle lens, the finished spectacle lens as defined in ISO 13666: 2019 (E) , section 3.8.7 (finished lens) , as lens (3.5.2) of which both sides have their final optical surface.
  • the finished spectacle lens may be either an uncut spectacle lens as defined in ISO 13666: 2019 (E) , section 3.8.8 (uncut lens) or an edged spectacle lens as defined in ISO 13666: 2019 (E) , section 3.8.9 (edged lens) .
  • the spectacle lens preferably is selected from at least one of
  • the spectacle lens further preferably is selected from at least one of a single-vision spectacle lens and a position-specific single-vision spectacle lens.
  • the spectacle lens comprises or is based on an optical material.
  • the optical material is as defined in ISO 13666: 2019 (E) , section 3.3.1, a transparent material capable of being manufactured into optical components.
  • the optical material preferably comprises a thermosetting hard resin as defined in ISO 13666: 2019 (E) , section 3.3.3, or a thermoplastic hard resin as defined in ISO 13666: 2019 (E) , section 3.3.4.
  • the optical material may additionally or alternatively comprise a glass as defined in ISO 13666: 2019 (E) , section 3.3.2.
  • the optical material preferably is having a uniform refractive index.
  • a structure shall be considered as “ring-shaped” if it surrounds a structure-free zone and there is a path within the structure which runs from a starting point within the structure around the structure-free zone and to the starting point again.
  • a structure may comprise one structure or more structures.
  • Ring-shaped may comprise circular, elliptical or otherwise curved rings encircling a domain of a lens surface, i.e., a front surface or a back surface, of a spectacle lens.
  • a domain encircled by one ring-shaped structure, or a domain encircled by a ring-shaped structure out of more ring-shaped structures preferably comprises directly adjacent to said ring-shaped structure no further structure.
  • a domain encircled by one ring-shaped diffusing structure, or a domain encircled by a ring-shaped diffusing structure out of more ring-shaped diffusing structures preferably comprises directly adjacent to said ring-shaped diffusing structure no further structure.
  • One ring-shaped structure of a digital twin of a spectacle lens is a mathematical description of a surface of one ring-shaped structure, said mathematical description not considering a mathematical description of a lens surface of the digital twin of the spectacle lens comprising the one ring-shaped structure, for example not considering a mathematical description of a front surface comprising the ring-shaped structure.
  • One ring-shaped structure of the digital twin of the spectacle lens is a single ring-shaped structure of said digital twin.
  • the mathematical description of the lens surface comprising the ring-shaped structure is a separate mathematical description from the mathematical description of the surface of the ring-shaped structure itself.
  • the surface of the ring-shaped structure and the lens surface of the digital twin of the spectacle lens comprising the ring-shaped structure are mathematically described piecewise.
  • the surface of the ring-shaped structure of the digital twin of the spectacle lens may be selected from at least one of the following surfaces or may be pieced together from parts of at least one of the following surfaces:
  • the ring-shaped structure of the digital twin of the spectacle lens has a surface power which is different to a surface power of a lens surface of the digital twin of the spectacle lens comprising the ring-shaped structure outside a domain occupied by the ring-shaped structure.
  • the surface power of the ring-shaped structure shall be defined analogously as in ISO 13666: 2019 (E) , section 3.10.4 (surface power) , as a local ability of the surface of the ring-shaped structure to change the calculated vergence of a digitally represented bundle of rays incident at the surface of the ring-shaped structure.
  • the surface power of the ring-shaped structure preferably is analogously as in note 1 to the entry in ISO 13666: 2019 (E) , section 3.10.4, determined from a radius or radii of the surface of the ring-shaped structure and a refractive index of a material of the ring-shaped structure, and is calculated for digitally represented light incident or emergent in air.
  • the refractive index may be an actual refractive index of a material of the ring-shaped structure or a nominal value.
  • the refractive index of the material of the ring-shaped structure preferably is assumed to be a same as a refractive index of an optical material of a digital twin of a spectacle lens.
  • the surface power of a lens surface of the digital twin of the spectacle lens shall be defined analogously as in ISO 13666: 2019 (E) , section 3.10.4 (surface power) , as a local ability of the lens surface of a digital twin of a spectacle lens to change the calculated vergence of a digitally represented bundle of rays incident at the lens surface.
  • the surface power of the lens surface is analogously as in note 1 to the entry in ISO 13666: 2019 (E) , section 3.10.4, determined from a radius or radii of the lens surface of the digital twin of the spectacle lens and a refractive index of an optical material of the digital twin of the spectacle lens, and is calculated for digitally represented light incident or emergent in air.
  • the refractive index may be an actual refractive index of the optical material of the digital twin of the spectacle lens or a nominal value.
  • One ring-shaped structure of a spectacle lens results from transferring a digital twin of a spectacle lens comprising said one ring-shaped structure in physical reality, by manufacturing said spectacle lens.
  • the surface of the ring-shaped structure of the spectacle lens may be selected from at least one of the following surfaces or may be pieced together from parts of at least one of the following surfaces:
  • the ring-shaped structure of the spectacle lens has a surface power which is different to a surface power of a lens surface of the spectacle lens comprising the ring-shaped structure outside a domain occupied by the ring-shaped structure.
  • the surface power of the ring-shaped structure is defined as in ISO 13666: 2019 (E) , section 3.10.4 (surface power) , as a local ability of a surface of the ring-shaped structure to change the vergence of a bundle of rays incident at the surface.
  • the surface power of the ring-shaped structure preferably is as in note 1 to the entry in ISO 13666: 2019 (E) , section 3.10.4, determined from a radius or radii of the surface of the ring-shaped structure and a refractive index (3.1.5) of a material of the ring-shaped structure, and is calculated for light (3.1.2) incident or emergent in air.
  • the refractive index may be an actual refractive index of the material of the ring-shaped structure or a nominal value.
  • the refractive index of the material of the ring-shaped structure preferably is assumed to be a same as a refractive index of an optical material of a spectacle lens.
  • the surface power of a lens surface of the spectacle lens is defined as in ISO 13666: 2019 (E) , section 3.10.4, as a local ability of a finished surface of a spectacle lens to change the vergence of a bundle of rays incident at the finished surface.
  • the surface power of the lens surface is as in note 1 to the entry in ISO 13666: 2019 (E) , section 3.10.4, determined from a radius or radii of the finished surface of the spectacle lens and a refractive index (3.1.5) of an optical material (3.3.1) of the spectacle lens, and is calculated for light (3.1.2) incident or emergent in air.
  • the refractive index may be an actual refractive index of the optical material or a nominal value.
  • “More ring-shaped structures of a digital twin of a spectacle lens” is a mathematical description of a surface of each ring-shaped structure, each mathematical description not considering a mathematical description of a lens surface of the digital twin of the spectacle lens comprising the more ring-shaped structures.
  • the mathematical description of the lens surface comprising the ring-shaped structures is a separate mathematical description from the mathematical description of each surface of the more ring-shaped structures themselves.
  • Each surface of the more ring-shaped structures and the lens surface of the digital twin of the spectacle lens comprising the more ring-shaped structures are mathematically described piecewise.
  • Each surface of the more ring-shaped structures of the digital twin of the spectacle lens may be selected from at least one of the following surfaces or may be pieced together from parts of at least one of the following surfaces:
  • the surfaces of the more ring-shaped structures of the digital twin of the spectacle lens each may be selected from a same surface, e.g., a same surface of the before mentioned, or may be pieced together from parts of a same surface, e.g., parts of a same surface of the before mentioned.
  • each surface of the more ring-shaped structures of the digital twin of the spectacle lens may be different to one another, e.g., said different surfaces may be selected from the before mentioned, or may be pieced together from parts of different surfaces, e.g., parts of different surfaces of the before mentioned.
  • At least one surface of the more ring-shaped structures of the digital twin of the spectacle lens may be different to other surfaces of the more ring-shaped structures, e.g., each of said surface may be selected from the before mentioned or pieced together from parts of the before mentioned such that at least one surface is different from the other surfaces of the more ring-shaped structures.
  • the more ring-shaped structures of the digital twin of the spectacle lens each have a surface power which is different to a surface power of a lens surface of the digital twin of the spectacle lens comprising the more ring-shaped structures outside each domain occupied by each of the more ring-shaped structures.
  • the surface power of each ring-shaped structure of the more ring-shaped structures shall be defined analogously as in ISO 13666: 2019 (E) , section 3.10.4 (surface power) , as a local ability of each surface of the more ring-shaped structures to change the calculated vergence of a digitally represented bundle of rays incident at each surface of the more ring-shaped structures.
  • the surface power of the more ring-shaped structures preferably is analogously as in note 1 to the entry in ISO 13666: 2019 (E) , section 3.10.4, determined from a radius or radii of each surface of the more ring-shaped structures and a refractive index of a material of each ring-shaped structure, and is calculated for digitally represented light incident or emergent in air.
  • the refractive index may be an actual refractive index of a material of each ring-shaped structure or a nominal value.
  • the refractive index of the material of each ring-shaped structure preferably is assumed to be a same as a refractive index of an optical material of a digital twin of a spectacle lens.
  • the surface power of a lens surface of the digital twin of the spectacle lens shall be defined analogously as in ISO 13666: 2019 (E) , section 3.10.4 (surface power) .
  • “More ring-shaped structures of a spectacle lens” results from transferring a digital twin of a spectacle lens comprising the more ring-shaped structures of in physical reality, by manufacturing said spectacle lens.
  • the surfaces of the more ring-shaped structures of the spectacle lens may be selected from at least one of the following surfaces or may be pieced together from parts of at least one of the following surfaces:
  • the surfaces of the more ring-shaped structures of the spectacle lens each may be selected from a same surface, e.g., a same surface of the before mentioned, or may be pieced together from parts of a same surface, e.g., parts of a same surface of the before mentioned.
  • each surface of the more ring-shaped structures of the spectacle lens may be different to one another, e.g., said different surfaces may be selected from the before mentioned, or may be pieced together from parts of different surfaces, e.g., parts of different surfaces of the before mentioned.
  • At least one surface of the more ring-shaped structures of the spectacle lens may be different to other surfaces of the more ring-shaped structures, e.g., each of said surface may be selected from the before mentioned or pieced together from parts of the before mentioned such that at least one surface is different from the other surfaces of the more ring-shaped structures.
  • the more ring-shaped structures of the spectacle lens each have a surface power which is different to a surface power of a lens surface of the spectacle lens comprising the more ring-shaped structures outside each domain occupied by each of said ring-shaped structures.
  • the surface power of each of the more ring-shaped structures is defined as in ISO 13666: 2019 (E) , section 3.10.4 (surface power) , as a local ability of each surface of the more ring-shaped structures to change the vergence of a bundle of rays incident at each surface.
  • the surface power of each of the more ring-shaped structures preferably is as in note 1 to the entry in ISO 13666: 2019 (E) , section 3.10.4, determined from a radius or radii of each surface of the more ring-shaped structures and a refractive index (3.1.5) of a material of each of the more ring-shaped structures, and is calculated for light (3.1.2) incident or emergent in air.
  • the refractive index may be an actual refractive index of the material of each of the more ring-shaped structures or a nominal value.
  • the refractive index of the material of each of the more ring-shaped structures preferably is assumed to be a same as a refractive index of an optical material of a spectacle lens.
  • the surface power of a lens surface of the spectacle lens is defined as in ISO 13666: 2019 (E) , section 3.10.4 (surface power) .
  • One ring-shaped diffusing structure of a digital twin of a spectacle lens constitute one optical element that is made of any material that diffuses or scatters light in some manner to transmit soft light. Diffuse light can be easily obtained by reflecting light from a white surface, while more compact diffusing structures may use translucent material, including ground glass, Teflon, holographs, opal glass, and greyed glass.
  • One ring-shaped diffusing structure may be regarded as one ring-shaped light modulating cell, preferably within a lens surface of said digital twin, said light modulating cell diffusing light as disclosed for example in WO 2020/261213 A1 or as one ring-shaped scattering centre, preferably within a lens surface of said digital twin, said scattering centre as disclosed for example in WO 2020/180817 A1 or in WO 2022/251713 A1.
  • One ring-shaped diffusing structure of a spectacle lens results from transferring of a digital twin of a spectacle lens comprising said one ring-shaped diffusing structure in physical reality, by manufacturing said spectacle lens.
  • “More ring-shaped diffusing structures of a digital twin of a spectacle lens” may be regarded as more than one of the before mentioned ring-shaped diffusing structures.
  • “More ring-shaped diffusing structures of a spectacle lens” results from transferring of a digital twin of a spectacle lens comprising said more ring-shaped diffusing structure in physical reality, by manufacturing said spectacle lens.
  • a “lens surface of a digital twin of a spectacle lens” is a mathematical description of a front surface of the digital twin of the spectacle lens or a mathematical description of a back surface of the digital twin of the spectacle lens.
  • the mathematical description of the front surface and the mathematical description of the back surface are piecewise mathematical descriptions, not considering a piecewise mathematical description of one ring-shaped structure, one ring-shaped diffusing structure, or of each ring-shaped structure of more ring-shaped structures or each ring-shaped diffusing structure of more ring-shaped diffusing structures.
  • the lens surface of the front surface and/or the lens surface of the back surface of the digital twin of the spectacle lens each is as defined in ISO 13666: 2019 (E) , section 3.4 or is defined analogously as in ISO 13666: 2019 (E) , section 3.4.
  • the lens surface may be formed as one of the following:
  • the lens surface of the front surface and the lens surface of the back surface of the digital twin of the spectacle lens may be formed of a same lens surface or of a different lens surface.
  • a “lens surface of a spectacle lens” results from a transfer of a lens surface of a digital twin of the spectacle lens in physical reality, by manufacturing the spectacle lens.
  • the lens surface of the front surface and/or the lens surface of the back surface of the spectacle lens each is as defined in ISO 13666: 2019 (E) , section 3.4 and may be formed as one of the following:
  • a “uniform width of one ring-shaped structure or of one ring-shaped diffusing structure” designates an expansion of said one ring-shaped structure or said one ring-shaped diffusing structure along a direction perpendicular to its circumferential direction as determined between onsets of said one ring-shaped structure or of said one ring-shaped diffusing structure.
  • An onset of one ring-shaped structure represents an inner onset (oi) , i.e., a first position and an outer onset (oo) , i.e., a last position in which a surface of said one ring-shaped structure deviates from a surface, preferably in the sense of surface shape, form or topography, of a lens surface of a digital twin of spectacle lens or of a lens surface of a spectacle lens, each comprising said one ring-shaped structure along the direction of the uniform width of said ring-shaped structure.
  • An onset of one ring-shaped diffusing structure represents an inner onset, i.e., a first position, and an outer onset, i.e., a last position, in which said one ring-shaped diffusing structure changes a calculated transmission of a digital twin of a spectacle lens or a transmission of a spectacle lens along the direction of the uniform width of said ring-shaped diffusing structure.
  • an inner onset is an onset that preferably is closer to a central zone and an outer onset preferably is further away from a central zone.
  • a uniform width of one ring-shaped structure or of one ring-shaped diffusing structure may alternatively comprise that in each tangential direction an expansion of said one ring-shaped structure or said one ring-shaped diffusing structure limited by a respective inner onset and a respective outer onset is of a same or uniform width.
  • Atangential direction shall be any direction from an optical centre or a fitting point of the digital twin of a spectacle lens or of a spectacle lens radially outwards.
  • the optical centre of a digital twin of a spectacle lens is defined analogously as in ISO 13666: 2019 (E) , section 3.2.15, as an intersection of the optical axis with the front surface of the digital twin.
  • the optical centre of a spectacle lens is as defined in ISO 13666: 2019 (E) , section 3.2.15, an intersection of the optical axis (3.1.8) with the front surface (3.2.13) of a lens (3.5.2) .
  • the fitting point of a digital twin of a spectacle lens is defined analogously as in ISO 13666: 2019 (E) , section 3.2.34, as a point on the front surface of the digital twin to be stipulated by the manufacturer for virtually positioning the digital twin in front of an eye.
  • the fitting point of a spectacle lens is as defined in ISO 13666: 2019 (E) , section 3.2.34, a point on the front surface (3.2.13) of a lens (3.5.2) or blank (3.8.1) stipulated by the manufacturer for positioning the lens in front of the eye.
  • a “uniform width of more ring-shaped structures or of more ring-shaped diffusing structures” designates an expansion of each of said more ring-shaped structures or of each of said more ring-shaped diffusing structures along a direction perpendicular to their respective circumferential direction as determined between respective onsets of each of said more ring-shaped structures or of each of said more ring-shaped diffusing structures.
  • a “respective onset of each of said more ring-shaped structures” represents each inner onset of each ring-shaped structure of said more ring-shaped structures, i.e., each first position and each outer onset of each ring-shaped structure of said more ring-shaped structures, i.e., each last position in which a surface of said one ring-shaped structure deviates from a surface, each preferably in the sense of surface shape, form or topography, of a lens surface of a digital twin of a spectacle lens or a spectacle lens, each comprising said more ring-shaped structure, along the direction of the respective uniform widths of said more ring-shaped structures.
  • An onset of one ring-shaped diffusing structure represents each inner onset, i.e., each first position, and each outer onset, i.e., each last position, in which each of said more ring-shaped diffusing structure changes a calculated transmission of digital twin of a spectacle lens or a transmission of a spectacle lens, along the direction of the respective uniform widths of said more ring-shaped diffusing structures.
  • a uniform width of each of said more ring-shaped structures or of each of said more ring-shaped diffusing structures may alternatively comprise that in each tangential direction an expansion of each ring-shaped structure of said more ring-shaped structure or each ring-shaped diffusing structure of said more ring-shaped diffusing structures each limited by a respective inner onset and a respective outer onset is of a same or uniform width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of the spectacle lens or the spectacle lens radially outwards.
  • a “central zone” is a domain of a lens surface, i.e., a front surface and/or a back surface, of a digital twin of a spectacle lens or a spectacle lens not comprising one or more ring-shaped structure (s) or not comprising one or more ring-shaped diffusing structure (s) .
  • One ring-shaped structure or an innermost of said more ring-shaped structures is adjacent to said central zone, thereby encircling said central zone.
  • one ring-shaped diffusing structure or an innermost of said more ring-shaped diffusing structures is adjacent to said central zone, thereby encircling said central zone.
  • said central zone comprise at least one of an optical centre and a fitting point of the digital twin of the spectacle lens or the spectacle lens.
  • a “central zone width” is a maximum expansion of a domain of said central zone on a lens surface of a digital twin of a spectacle lens or a spectacle lens, i.e., a respective front surface and/or a respective back surface thereof, limited by two inner onsets of one ring-shaped structure or one ring-shaped diffusing structure in opposite tangential directions or limited by two inner onsets of an innermost ring-shaped structure of more ring-shaped structures or by two inner onset of an innermost ring-shaped diffusing structure of more ring-shaped diffusing structures in opposite tangential directions.
  • a central zone width may be a maximum expansion of a domain of said central zone on a lens surface of a digital twin of a spectacle lens or a spectacle lens, i.e., a respective front surface and/or a respective back surface thereof, limited by the respective before mentioned two inner onsets along each line through an optical centre or a fitting point of the spectacle lens.
  • a central zone with a central zone width within a range of 6 mm to 9.4 mm has the advantage that a small central zone, e.g., 6 mm increases the probable efficacy of the spectacle lens for the reduction of progression of myopia for the wearer. At the same time said small central zone decreases the acceptance of the spectacle lens by the wearer due to the decreased comfort of wearability of the spectacle lens.
  • a large central zone, e.g., 9.4 mm decreases the probable efficacy of the spectacle lens for the reduction of progression of myopia for the wearer. At the same time said large central zone increases the acceptance of the spectacle lens by the wearer due to the increased comfort of wearability of the spectacle lens.
  • a “surface-based fill factor” is determined by a surface area ratio of a surface area of an innermost ring-shaped structure of more ring-shaped structures and a sum of said surface area of said said innermost ring-shaped structure of said more ring-shaped structures and a surface area of a peripheral zone.
  • a “surface-based fill factor” is determined by a surface area ratio of a surface area of an innermost ring-shaped diffusing structure of more ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a surface area of a peripheral zone.
  • a “peripheral zone” is additionally to a central zone a further domain of the respective lens surface, not comprising one or more ring-shaped structure (s) or not comprising one or more ring-shaped diffusing structure (s) .
  • Said one ring-shaped structure or said one ring-shaped diffusing structure each is separating said central zone from said peripheral zone.
  • said peripheral zone expands from an outer onset line of said one ring-shaped structure or from an outer onset line of said ring-shaped diffusing structure to an edge of said lens surface.
  • the respective outer onset line passes along each outer onset of said one ring-shaped structure or each outer onset of said one ring-shaped diffusing structure, the respective outer onset line is thereby surrounded or encircled by said peripheral zone.
  • an inner onset line is an onset line that preferably is closer to a central zone and an outer onset line preferably is further away from a central zone.
  • said one ring-shaped structure or said one ring-shaped diffusing structure is replaced by at least one selected from the group consisting of one ring-shaped diffractive structure, one ring-shaped structure having a variable surface power, one ring-shaped structure having a variable width and one ring-shaped diffusing structure having a variable width
  • one ring-shaped structure or said one ring-shaped diffusing structure is replaced by at least one selected from the group consisting of one ring-shaped diffractive structure, one ring-shaped structure having a variable surface power, one ring-shaped structure having a variable width and one ring-shaped diffusing structure having a variable width
  • a “peripheral zone” is additionally to a central zone a further domain of the respective lens surface, not comprising one or more ring-shaped structure (s) or not comprising one or more ring-shaped diffusing structure (s) .
  • the peripheral zone is the further domain not comprising one or more ring-shaped structure (s) or not comprising one or more ring-shaped diffusing structure (s) closest to a central zone and separated from the central zone by an innermost ring-shaped structure of said more ring-shaped structures or separated from the central zone by an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures.
  • said lens surface of said digital twin of said spectacle lens or of said spectacle lens comprises said more ring-shaped structures said peripheral zone expands from an outer onset line of said innermost ring-shaped structure to an inner onset line of a closest neighbouring ring-shaped structure of said more ring-shaped structures.
  • said peripheral zone expands from an outer onset line of said innermost ring-shaped structure to an inner onset line of a closest neighbouring ring-shaped diffusing structure of said more ring-shaped diffusing structures.
  • the respective outer onset line passes along each outer onset of said innermost ring-shaped structure or each outer onset of said innermost ring-shaped diffusing structure, the respective outer onset line is thereby surrounded by said peripheral zone.
  • the respective inner onset line passes along each inner onset of said closest neighbouring ring-shaped structure or each inner onset of said closest neighbouring ring-shaped diffusing structure, the respective inner onset line thereby limiting an expansion of said peripheral zone.
  • an innermost ring-shaped structure is closest neighbouring a ring-shaped diffusing-structure, optionally of said more ring-shaped diffusing structures, or in case an innermost ring-shaped diffusing structure, optionally of said more ring-shaped diffusing structures, is closest neighbouring a ring-shaped structure, optionally of said more ring-shaped structures, the before given definition for a peripheral zone in case of more ring-shaped structures or more ring-shaped diffusing structures shall apply analogously.
  • a surface area of one ring-shaped structure or of an innermost ring-shaped structure of more ring-shaped structures is determined by an inner onset line and an outer onset line of said one ring-shaped structure or said innermost ring-shaped structure.
  • the surface area of one ring-shaped diffusing structure or of an innermost ring-shaped diffusing structure of more ring-shaped diffusing structures is determined by an inner onset line and an outer onset line of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure.
  • the inner onset line passes along each inner onset of said one ring-shaped structure or said innermost ring-shaped structure, the inner onset line is thereby surrounding or encircling a central zone.
  • the inner onset line passes along each inner onset of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure, the inner onset line is thereby surrounding or encircling a central zone.
  • the outer onset line passes along each outer onset of said one ring-shaped structure or said innermost ring-shaped structure, the outer onset line is thereby surrounded or encircled by a peripheral zone.
  • the outer onset line passes along each outer onset of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure.
  • the respective inner onset line and the respective outer onset line of said one ring-shaped structure or said innermost ring-shaped structure or the respective inner onset line and the respective outer onset line of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure each are enclosing a surface area along a lens surface, i.e., a front surface and/or back surface, of a digital twin of a spectacle lens or a spectacle lens, without structure (s) , said surface area is the surface area of said one ring-shaped structure or said innermost ring-shaped structure of said more ring-shaped structures or is the surface area of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures.
  • said one ring-shaped structure, said one ring-shaped diffusing structure, said innermost ring-shaped structure, and said innermost ring-shaped diffusing structure is replaced by at least one selected from the group consisting of one ring-shaped diffractive structure, one ring-shaped structure having a variable surface power, one ring-shaped structure having a variable width and one ring-shaped diffusing structure having a variable width the before given definition of a respective surface area shall apply analogously.
  • a “surface area of a peripheral zone” is determined by an outer onset line of an innermost ring-shaped structure of said more ring-shaped structures and an inner onset line of a closest neighbouring ring-shaped structure of said more ring-shaped structures.
  • a “surface area of a peripheral zone” is determined by an outer onset line of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and an inner onset line of a closest neighbouring ring-shaped diffusing structure of said more ring-shaped diffusing structures.
  • Said inner onset line of said closest neighbouring ring-shaped structure or said inner onset line of said closest neighbouring ring-shaped diffusing structure each passes along each inner onset of said closest neighbouring ring-shaped structure or said closest ring-shaped diffusing structure, said respective inner onset line thereby surrounding and encircling the peripheral zone.
  • the outer onset line of said innermost ring-shaped structure and the inner onset line of said closest neighbouring ring-shaped structure are enclosing a surface area along a lens surface of a digital twin of a spectacle lens or along a lens surface of a spectacle lens, each comprising said more ring-shaped structures, said surface area is the surface area of the peripheral zone.
  • the outer onset line of said innermost ring-shaped diffusing structure and the inner onset line of said closest neighbouring ring-shaped diffusing structure are enclosing a surface area along a lens surface of a digital twin of a spectacle lens or along a lens surface of a spectacle lens, each comprising said more ring-shaped diffusing structures, said surface area is the surface area of the peripheral zone.
  • a surface area of a peripheral zone is determined by an outer onset line of the innermost ring-shaped structure and an inner onset line of a closest neighbouring ring-shaped diffusing structure.
  • the outer onset line of said innermost ring-shaped structure and the inner onset line of said closest neighbouring ring-shaped diffusing structure are enclosing a surface area along a lens surface of a digital twin of a spectacle lens or along a lens surface a spectacle lens, each comprising said ring-shaped structure and said ring-shaped diffusing structure, said surface area is the surface area of the peripheral zone.
  • a surface area of a peripheral zone is determined by an outer onset line of the innermost ring-shaped diffusing structure and an outer onset line of a closest neighbouring ring-shaped structure.
  • the outer onset line of said innermost ring-shaped diffusing structure and the inner onset line of said closest neighbouring ring-shaped structure are enclosing a surface area along a lens surface of a digital twin of a spectacle lens or along a lens surface of a spectacle lens, each comprising said ring-shaped diffusing structure and said ring-shaped structure, said surface area is the surface area of the peripheral zone.
  • a peripheral zone shall apply analogously when an innermost ring-shaped structure or an innermost ring-shaped diffusing structure is closest neighboured by a structure selected from one of
  • one innermost ring-shaped diffusing structure having a variable width is closest neighboured by a structure selected from one of
  • the surface-based fill-factor has the advantage to define a balance between wearability and manufacturing of a spectacle lens comprising at least two selected from the group consisting of said ring-shaped structure (s) , said ring-shaped diffusing structure (s) , said ring-shaped diffractive structure (s) , said ring-shaped structure (s) having a variable surface power, said ring-shaped structure (s) having a variable width, said ring-shaped diffusing structure (s) having a variable width.
  • a well-defined balance between the wearability and the manufacturing of the inventive spectacle lens is achieved with a surface-based fill factor in the range of 34.6-59.2%.
  • a surface-based fill factor of 46.4 to 47.7% is preferred.
  • One ring-shaped diffractive structure of a digital twin of a spectacle lens may have a diffractive surface described for example in EP 3 561 578 A1, paragraphs [0177] to [0180] , or in WO 2020/261213 A1, paragraph [00108] .
  • One ring-shaped diffractive structure of a spectacle lens results from transferring a digital twin of a spectacle lens comprising said one ring-shaped diffractive structure in physical reality, by manufacturing said spectacle lens.
  • “More ring-shaped diffractive structures of a digital twin of a spectacle lens” comprise more than one ring-shaped diffractive structures as described before.
  • “More ring-shaped diffractive structures of a spectacle lens” result from transferring a digital twin of a spectacle lens comprising said more ring-shaped diffractive structures in physical reality, by manufacturing said spectacle lens.
  • One ring-shaped structure having a variable surface power on a digital twin of a spectacle lens shall comprise that a surface power of said one ring-shaped structure, the surface power defined analogously as in ISO 13666: 2019 (E) , section 3.10.4, along a circumferential direction of said one ring-shaped structure is not uniform.
  • one ring-shaped structure having a variable surface power shall mean that a surface power of said one ring-shaped structure along a direction perpendicular to a tangential direction is not uniform.
  • One ring-shaped structure having a variable surface power on a spectacle lens results from transferring a digital twin of a spectacle lens comprising said one ring-shaped structure having a variable surface power in physical reality, by manufacturing said spectacle lens.
  • Avariable surface power of one ring-shaped structure shall mean that the surface power as defined in ISO 13666: 2019 (E) , section 3.10.4, along a circumferential direction of said one ring-shaped structure is not uniform.
  • one ring-shaped structure having a variable surface power shall mean that a surface power of said one ring-shaped structure along a direction perpendicular to a tangential direction is not uniform.
  • “More ring-shaped structures each having a variable surface power on a digital twin of a spectacle lens” shall comprise that a surface power of each ring-shaped structure of said more ring-shaped structures, the surface power defined analogously as in ISO 13666: 2019 (E) , section 3.10.4, along a circumferential direction of each ring-shaped structure is not uniform.
  • more ring-shaped structures having a variable surface power shall mean that a surface power of each ring-shaped structure of said more ring-shaped structures along a direction perpendicular to a tangential direction is not uniform.
  • “More ring-shaped structures each having a variable surface power on a spectacle lens” results from transferring a digital twin of a spectacle lens comprising said more ring-shaped structures each having a variable surface power in physical reality, by manufacturing said spectacle lens.
  • a variable surface power of each ring-shaped structure of said more ring-shaped structures shall mean that the surface power as defined in ISO 13666: 2019 (E) , section 3.10.4, along a circumferential direction of each ring-shaped structure of said more ring-shaped structures is not uniform.
  • more ring-shaped structure having a variable surface power shall mean that a surface power of each ring-shaped structure of said more ring-shaped structures along a direction perpendicular to a tangential direction is not uniform.
  • One ring-shaped structure having a variable width on a digital twin of a spectacle lens shall comprise the definition provided before for one ring-shaped structure.
  • a “variable width of one ring-shaped structure” designates a variable expansion of said one ring-shaped structure along different directions perpendicular to a circumferential direction as determined between onsets, i.e., an inner and an outer onset, of said one ring-shaped structure.
  • An onset of one ring-shaped structure represents an inner onset, i.e., a first position and an outer onset, i.e., a last position in which a surface, preferably in the sense of surface shape, form or topography, of said one ring-shaped structure deviates from a surface of a lens surface of a digital twin of a spectacle lens comprising said one ring-shaped structure, along the respective direction of the variable width of said ring-shaped structure.
  • a variable width of one ring-shaped structure may alternatively comprise that in each tangential direction or in different tangential directions an expansion of said one ring-shaped structure limited by an inner onset and an outer onset is of a different width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of a spectacle lens radially outwards.
  • One ring-shaped structure having a variable width on a spectacle lens results from transferring a digital twin of a spectacle lens comprising one ring-shaped structure having a variable width in physical reality, by manufacturing said spectacle lens.
  • the definition given before with respect to one ring-shaped structure of a spectacle lens shall apply accordingly.
  • a “variable width of one ring-shaped structure” designates a variable expansion of said one ring-shaped structure along different directions perpendicular to a circumferential direction as determined between onsets, i.e., an inner and an outer onset, of said one ring-shaped structure.
  • An onset of one ring-shaped structure represents an inner onset, i.e., a first position and an outer onset, i.e., a last position in which a surface of said one ring-shaped structure deviates from a surface–surface preferably in the sense of surface shape, form or topography-of a lens surface of a spectacle lens comprising said one ring-shaped structure, along the respective direction of the variable width of said ring-shaped structure.
  • a variable width of one ring-shaped structure may alternatively comprise that in each tangential direction or in different tangential directions an expansion of said one ring-shaped structure limited by an inner onset and an outer onset is of a different width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of a spectacle lens radially outwards.
  • “More ring-shaped structures each having a variable width on a digital twin of a spectacle lens shall comprise the definition provided before with respect to more ring-shaped structures of a digital twin of a spectacle lens.
  • a “variable width of more ring-shaped structures” designates a variable expansion of each of said more ring-shaped structures along a perpendicular direction to their respective circumferential direction as determined between respective onsets, i.e., arespective inner onset and a respective outer onset, of each ring-shaped structure of said more ring-shaped structures.
  • a “respective onset of each of said more ring-shaped structures” represents each inner onset of each ring-shaped structure of said more ring-shaped structures, i.e., each first position and each outer onset of each ring-shaped structure of said more ring-shaped structures, i.e., each last position in which a surface of said one ring-shaped structure deviates from a surface, surface preferably in the sense of surface shape, form or topography, of a lens surface of a digital twin of a spectacle lens, each comprising said more ring-shaped structure, along the direction of the respective variable widths of each ring-shaped structure of said more ring-shaped structures.
  • a variable width of each ring-shaped structure of said more ring-shaped structures may alternatively comprise that in each tangential direction or in different tangential directions an expansion of each ring-shaped structure of said more ring-shaped structures limited by a respective inner onset and a respective outer onset is of a different width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of the spectacle lens radially outwards.
  • “More ring-shaped structures each having a variable width on a spectacle lens” result from transferring a digital twin of a spectacle lens comprising said more ring-shaped structures each having a variable width in physical reality, by manufacturing said spectacle lens.
  • the definition provided before with respect to more ring-shaped structures of a spectacle lens shall apply accordingly.
  • a “variable width of more ring-shaped structures” designates a variable expansion of each ring-shaped structure of said more ring-shaped structures along a perpendicular direction to their respective circumferential direction as determined between respective onsets, i.e., a respective inner onset and a respective outer onset, of each ring-shaped structure of said more ring-shaped structures.
  • a “respective onset of each of said more ring-shaped structures” represents each inner onset of each ring-shaped structure of said more ring-shaped structures, i.e., each first position, and each outer onset of each ring-shaped structure of said more ring-shaped structures, i.e., each last position in which a surface of each ring-shaped structure deviates from a surface, preferably in the sense of surface shape, form or topography, of a lens surface of a spectacle lens, each comprising said more ring-shaped structure, along the direction of the respective variable widths of each ring-shaped structure of said more ring-shaped structures.
  • a variable width of each of said more ring-shaped structures may alternatively comprise that in each tangential direction or in different tangential directions an expansion of each ring-shaped structure of said more ring-shaped structure limited by a respective inner onset and a respective outer onset is of a different width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of the spectacle lens radially outwards.
  • One ring-shaped diffusing structure having a variable width on a digital twin of a spectacle lens shall comprise the definition provided before for one ring-shaped diffusing structure.
  • a “variable width of one ring-shaped diffusing structure” designates a variable expansion of said one ring-shaped diffusing structure along different directions perpendicular to a circumferential direction as determined between onsets, i.e., an inner and an outer onset, of said one ring-shaped diffusing structure.
  • An onset of one ring-shaped diffusing structure represents an inner onset, i.e., a first position and an outer onset, i.e., a last position in which said one ring-shaped diffusing structure changes a calculated transmission of a digital twin of a spectacle lens along the respective direction of the variable width of said one ring-shaped diffusing structure.
  • a variable width of one ring-shaped diffusing structure may alternatively comprise that in each tangential direction or in different tangential directions an expansion of said one ring-shaped diffusing structure limited by an inner onset and an outer onset is of a different width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of a spectacle lens radially outwards.
  • One ring-shaped diffusing structure having a variable width on a spectacle lens results from transferring a digital twin of a spectacle lens comprising one ring-shaped diffusing structure having a variable width in physical reality, by manufacturing said spectacle lens.
  • the definition given before with respect to one ring-shaped diffusing structure of a spectacle lens shall apply accordingly.
  • a “variable width of one ring-shaped diffusing structure” designates a variable expansion of said one ring-shaped diffusing structure along different directions perpendicular to a circumferential direction as determined between onsets, i.e., an inner and an outer onset, of said one ring-shaped diffusing structure.
  • An onset of one ring-shaped diffusing structure represents an inner onset, i.e., a first position and an outer onset, i.e., a last position in which said one ring-shaped diffusing structure changes a transmission of a spectacle lens along the respective direction of the variable width of said ring-shaped diffusing structure.
  • a variable width of one ring-shaped diffusing structure may alternatively comprise that in each tangential direction or in different tangential directions an expansion of said one ring-shaped diffusing structure limited by an inner onset and an outer onset is of a different width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of a spectacle lens radially outwards.
  • “More ring-shaped diffusing structures each having a variable width on a digital twin of a spectacle lens” shall comprise the definition provided before with respect to more ring-shaped diffusing structures of a digital twin of a spectacle lens.
  • a “variable width of more ring-shaped diffusing structures” designates a variable expansion of each of said more ring-shaped diffusing structures along a perpendicular direction to their respective circumferential direction as determined between respective onsets, i.e., a respective inner onset and a respective outer onset, of each ring-shaped diffusing structure of said more ring-shaped diffusing structures.
  • a “respective onset of each ring-shaped diffusing structure of said more ring-shaped diffusing structures” represents each inner onset of each ring-shaped diffusing structure of said more ring-shaped diffusing structures, i.e., each first position and each outer onset of each ring-shaped diffusing structure of said more ring-shaped diffusing structures, i.e., each last position in which said one ring-shaped diffusing structure changes a calculated transmission of a digital twin of a spectacle lens along the respective direction of the variable width of each ring-shaped diffusing structure of said more ring-shaped diffusing structures.
  • a variable width of each ring-shaped diffusing structure of said more ring-shaped diffusing structures may alternatively comprise that in each tangential direction or in different tangential directions an expansion of each ring-shaped diffusing structure of said more ring-shaped diffusing structures limited by a respective inner onset and a respective outer onset is of a different width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of the spectacle lens radially outwards.
  • “More ring-shaped diffusing structures each having a variable width on a spectacle lens” result from transferring a digital twin of a spectacle lens comprising said more ring-shaped diffusing structures each having a variable width in physical reality, by manufacturing said spectacle lens.
  • the definition provided before with respect to more ring-shaped diffusing structures of a spectacle lens shall apply accordingly.
  • a “variable width of more ring-shaped diffusing structures” designates a variable expansion of each ring-shaped diffusing structure of said more ring-shaped diffusing structures along a perpendicular direction to their respective circumferential direction as determined between respective onsets, i.e., a respective inner onset and a respective outer onset, of each ring-shaped diffusing structure of said more ring-shaped structures.
  • a “respective onset of each of said more ring-shaped diffusing structures” represents each inner onset of each ring-shaped diffusing structure of said more ring-shaped diffusing structures, i.e., each first position, and each outer onset of each ring-shaped diffusing structure of said more ring-shaped diffusing structures, i.e., each last position in which said each ring-shaped diffusing structure changes a transmission of a spectacle lens along the respective direction of the variable width of each ring-shaped diffusing structure of said more ring-shaped structures.
  • a variable width of each ring-shaped diffusing structure of said more ring-shaped structures may alternatively comprise that in each tangential direction or in different tangential directions an expansion of each ring-shaped diffusing structure of said more ring-shaped diffusing structure limited by a respective inner onset and a respective outer onset is of a different width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of the spectacle lens radially outwards.
  • the digital twin of the spectacle lens configured for the purpose of manufacturing the spectacle lens is characterized in that a central zone comprises an optical centre defined analogously as in ISO 13666: 2019 (E) , section 3.2.15, or a fitting point defined analogously as in ISO 13666: 2019 (E) , section 3.2.34, of said digital twin.
  • the digital twin of the spectacle lens configured for the purpose of manufacturing the spectacle lens is characterized in that a uniform width of at least one of the group consisting of one ring-shaped structure, more ring-shaped structures, preferably each ring-shaped structure of said more ring-shaped structures, one ring-shaped diffusing structure and more ring-shaped diffusing structures, preferably each ring-shaped diffusing structure of said more ring-shaped diffusing structures is within at least one range of the following group of ranges:
  • said uniform width is larger than 0.2 mm and equal or lower than 0.7 mm;
  • said uniform width is larger than 0.3 mm and equal or lower than 0.7 mm;
  • said uniform width is equal or lower than 0.6 mm;
  • said uniform width is larger than 0.2 mm and equal or lower than 0.6 mm;
  • said uniform width is larger than 0.3 mm and equal or lower than 0.6 mm;
  • said uniform width is equal or lower than 0.5 mm
  • said uniform width is larger than 0.2 mm and equal or lower than 0.5 mm;
  • said uniform width is larger than 0.3 mm and equal or lower than 0.5 mm.
  • a uniform width within any one of the before mentioned ranges has the beneficial effect to define a well-defined balance between wearability and manufacturing of a respective spectacle lens.
  • a decrease of the uniform width leads to a more comfortable wearability whereas an increase of the uniform width enables easier manufacturing of the respective spectacle lens.
  • the digital twin of the spectacle lens configured for the purpose of manufacturing the spectacle lens is characterized in that a central zone width is within at least one range of the following group of ranges:
  • said central zone width (cw110, cw210, cw310, ...) is larger than 6 mm and lower than or equal to 7 mm;
  • said central zone width (cw110, cw210, cw310, ...) is larger than 7 mm and lower than or equal to 9.4 mm.
  • the digital twin of the spectacle lens configured for the purpose of manufacturing the spectacle lens is characterized in that one ring-shaped structure or each of said more ring-shaped structures provide (s) a surface power to said digital twin which is different to a surface power of a lens surface comprising said one or more ring-shaped structure (s) outside a domain occupied by said ring-shaped structure (s) , within at least one range of the following group of ranges:
  • a difference in surface power as in the selected ranges given before has the beneficial effect to further define a balance between wearability and manufacturing of a respective spectacle lens.
  • a difference in surface power between 10 dioptres and 12 dioptres preferably increases the probable efficacy of the respective spectacle lens for a reduction of progression of myopia for a wearer.
  • a difference in surface power between 6 dioptres and 8 dioptres preferably increases a comfortable wearability of a respective spectacle lens. In other words, a well-defined balance between wearability and manufacturing of the respective spectacle lens is achieved with a difference in surface power in the range of 6 dioptres to 12 dioptres.
  • the digital twin of the spectacle lens configured for the purpose of manufacturing the spectacle lens is characterized in that a variable width of at least one of the group consisting of one ring-shaped structure, more ring-shaped structures, preferably each ring-shaped structure of said more ring-shaped structures, one ring-shaped diffusing structure and more ring-shaped diffusing structures, preferably each ring-shaped diffusing structure of said more ring-shaped diffusing structures varies within at least one range of the following group of ranges:
  • variable width varies in a range of larger than 0.2 mm and equal or lower than 0.7 mm;
  • variable width varies in a range of larger than 0.3 mm and equal or lower than 0.7 mm;
  • variable width varies in a range of lower than 0.6 mm
  • variable width varies in a range of larger than 0.2 mm and equal or lower than 0.6 mm;
  • variable width varies in a range of larger than 0.3 mm and equal or lower than 0.6 mm;
  • variable width varies in a range of lower than 0.5 mm
  • variable width varies in a range of larger than 0.2 mm and equal or lower than 0.5 mm;
  • variable width varies in a range of larger than 0.3 mm and equal or lower than 0.5 mm.
  • a variable width within any one of the before mentioned ranges has the beneficial effect to define a well-defined balance between wearability and manufacturing of a respective spectacle lens in each ring-shaped structure having a variable width or in each ring-shaped diffusing structure having a variable width.
  • a decrease of the variable width within each ring-shaped structure or within each ring-shaped diffusing structure leads to a more comfortable wearability whereas an increase of the variable width within each ring-shaped structure or within each ring-shaped diffusing structure enables easier manufacturing of the respective spectacle lens.
  • the digital twin of the spectacle lens configured for the purpose of manufacturing the spectacle lens is characterized in that one ring-shaped structure having a variable surface power or each ring-shaped structure of more ring-shaped structures having a variable surface power provide a variable surface power to said digital twin which is different to a surface power of a lens surface comprising said one or more ring-shaped structure (s) having said variable surface power outside a domain occupied by said one or more ring-shaped structure (s) having said variable surface power, varying within at least one range of the following group of ranges:
  • a difference in surface power varying within one ring-shaped structure having a variable surface power or within each ring-shaped structure of more ring-shaped structures having a variable surface power as in the selected ranges given before has the beneficial effect to further define a balance between wearability and manufacturing of a respective spectacle lens.
  • a difference in surface power varying between 10 dioptres and 12 dioptres within one ring-shaped structure having a variable surface power or within each ring-shaped structure of more ring-shaped structures having a variable surface power preferably increases the probable efficacy of the respective spectacle lens for a reduction of progression of myopia for a wearer.
  • a difference in surface power between 6 dioptres and 8 dioptres within one ring-shaped structure having a variable surface power or within each ring-shaped structure of more ring-shaped structures having a variable surface power preferably increases a comfortable wearability of a respective spectacle lens.
  • a well-defined balance between wearability and manufacturing of the respective spectacle lens is achieved with a difference in surface power varying in the range of 6 dioptres to 12 dioptres within one ring-shaped structure having a variable surface power or within each ring-shaped structure of more ring-shaped structures having a variable surface power.
  • the computer-implemented method according to the invention configured for calculating a digital twin of a spectacle lens (100 to 300) for the purpose of a use of said digital twin for manufacturing the spectacle lens, said digital twin comprising one ring-shaped structure or more ring-shaped structures (101, 102, 103, ...) or one ring-shaped diffusing structure or more ring-shaped diffusing structures (301, 302, 303, 7) each having a respective uniform width (w101, w102, w103, ...; w301, w302, w303, ...) , comprises the steps of
  • a surface-based fill factor (sf101, sf201) defined as a surface area ratio of a surface area of an innermost of said more ring-shaped structures (101, 102, 103, ...) or of an innermost of said more ring-shaped diffusing structures (301, 302, 303, ...) and a sum of said surface area of said innermost ring-shaped structure of said more ring-shaped structures (101, 102, 103, ...) or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures (301, 302, 303, ...) and a surface area of a peripheral zone (110, 210, 310, ...) , such that said surface-based fill factor is
  • the computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens comprises the step of
  • a central zone such as to comprise an optical centre defined analogously as in ISO 13666: 2019 (E) , section 3.2.15, or a fitting point defined analogously as in ISO 13666: 2019 (E) , section 3.2.34, of said digital twin.
  • the computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens comprises the step of
  • said uniform width is larger than 0.2 mm and equal or lower than 0.7 mm;
  • said uniform width is larger than 0.3 mm and equal or lower than 0.7 mm;
  • said uniform width is equal or lower than 0.6 mm;
  • said uniform width is larger than 0.2 mm and equal or lower than 0.6 mm;
  • said uniform width is larger than 0.3 mm and equal or lower than 0.6 mm;
  • said uniform width is equal or lower than 0.5 mm
  • said uniform width is larger than 0.2 mm and equal or lower than 0.5 mm;
  • said uniform width is larger than 0.3 mm and equal or lower than 0.5 mm.
  • the computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens comprises the step of
  • a central zone width such as to be set within at least one range of the following group of ranges:
  • said central zone width (cw110, cw210, cw310, ...) is larger than 6 mm and lower than or equal to 7 mm;
  • said central zone width (cw110, cw210, cw310, ...) is larger than 7 mm and lower than or equal to 9.4 mm.
  • the computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens comprises the step of
  • the computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens comprises the step of
  • variable width varies in a range of larger than 0.2 mm and equal or lower than 0.7 mm;
  • variable width varies in a range of larger than 0.3 mm and equal or lower than 0.7 mm;
  • variable width varies in a range of lower than 0.6 mm
  • variable width varies in a range of larger than 0.2 mm and equal or lower than 0.6 mm;
  • variable width varies in a range of larger than 0.3 mm and equal or lower than 0.6 mm;
  • variable width varies in a range of lower than 0.5 mm
  • variable width varies in a range of larger than 0.2 mm and equal or lower than 0.5 mm;
  • variable width varied in a range of larger than 0.3 mm and equal or lower than 0.5 mm.
  • the computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens comprises the step of
  • variable surface power for said one ring-shaped structure having a variable surface power or for each of said more ring-shaped structures having a variable surface power such that the variable surface power is different to a surface power of a lens surface comprising said one or more ring-shaped structure (s) having said variable surface power outside a domain occupied by said one or more ring-shaped structure (s) having said variable surface power, varying within at least one range of the following group of ranges:
  • acomputer comprising a processor is configured to perform the before described computer-implemented method.
  • a data processing system comprises a processor and a storage medium coupled to the processor, wherein the processor is adapted to perform the before described computer-implemented method based on a computer program stored on the storage medium.
  • Said computer program may be stored on a non-transitory tangible computer-readable storage medium, the computer program comprising instructions which, when the program is executed by a computer, cause the computer to carry out the computer-implemented method described before.
  • acomputer program comprises instructions which, when the program is executed by a computer, cause the computer to carry out the before described computer-implemented method.
  • Said computer program may be stored on a non-transitory tangible computer-readable storage medium, the computer program comprising instructions which, when the program is executed by a computer, cause the computer to carry out the above-described computer-implemented method.
  • a computer-readable medium having stored thereon said computer program.
  • Said computer-readable storage medium may be a non-transitory tangible computer-readable storage medium.
  • a computer-readable medium comprises instructions which, when executed by a computer, cause the computer to carry out the before described computer-implemented method.
  • Said computer-readable storage medium may be a non-transitory tangible computer-readable storage medium.
  • acomputer-readable data carrier having stored thereon the before mentioned computer program.
  • adata carrier signal is carrying the before mentioned computer program.
  • a spectacle lens according to the invention comprises
  • a surface-based fill factor defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said more ring-shaped structures or of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped structure of said more ring-shaped structures or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a surface area of a peripheral zone, said surface-based fill factor being larger than 17 %and equal or lower than 70%for said uniform width of said more ring-shaped structures or said more ring-shaped diffusing structures in a range of 0.6 mm to 0.7 mm;
  • a surface-based fill factor defined as a surface area ratio of a surface area an innermost ring-shaped structure of said more ring-shaped structures or of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped structure of said more ring-shaped structures or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a surface area of a peripheral zone, said surface-based fill factor being larger than 15 %and equal or lower than 60 %for said uniform width of said more ring-shaped structures or said more ring-shaped diffusing structures in a range of 0.5 mm to 0.6 mm;
  • a surface-based fill factor defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said more ring-shaped structures or of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a sum of said surface area of said an innermost ring-shaped structure of said more ring-shaped structures or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a surface area of a peripheral zone, said surface-based fill factor being larger than 6 %and equal or lower than 50 %for said uniform width of said more ring-shaped structures or said more ring-shaped diffusing structures lower than 0.5 mm,
  • said spectacle lens being characterized in comprising at least one second additional feature of the following group of second features:
  • the spectacle lens is characterized in that a central zone comprises an optical centre as defined in ISO 13666: 2019 (E) , section 3.2.15, or a fitting point as defined in ISO 13666: 2019 (E) , section 3.2.34, of said spectacle lens.
  • the spectacle lens is characterized in that a uniform width of at least one of the group selected from one ring-shaped structure, more ring-shaped structures, preferably each ring-shaped structure of said more ring-shaped structures, one ring-shaped diffusing structure and more ring-shaped diffusing structures, preferably each ring-shaped diffusing structure of said more ring-shaped diffusing structures is within at least one range of the following group of ranges:
  • said uniform width is larger than 0.2 mm and equal or lower than 0.7 mm;
  • said uniform width is larger than 0.3 mm and equal or lower than 0.7 mm;
  • said uniform width is equal or lower than 0.6 mm;
  • said uniform width is larger than 0.2 mm and equal or lower than 0.6 mm;
  • said uniform width is larger than 0.3 mm and equal or lower than 0.6 mm;
  • said uniform width is equal or lower than 0.5 mm
  • said uniform width is larger than 0.2 mm and equal or lower than 0.5 mm;
  • said uniform width is larger than 0.3 mm and equal or lower than 0.5 mm.
  • the spectacle lens is characterized in that a central zone width is within at least one range of the following group of ranges:
  • said central zone width (cw110, cw210, cw310, ...) is larger than 6 mm and lower than or equal to 7 mm;
  • said central zone width (cw110, cw210, cw310, ...) is larger than 7 mm and lower than or equal to 9.4 mm.
  • the spectacle lens is characterized in that one ring-shaped structure or each ring-shaped structure of more ring-shaped structures provide (s) asurface power to said spectacle lens which is different to a surface power of a lens surface comprising said one or more ring-shaped structure (s) outside a domain occupied by said ring-shaped structure (s) , within at least one range of the following group of ranges:
  • the spectacle lens is characterized in that a variable width of at least one of the group consisting of one ring-shaped structure having a variable width, each ring-shaped structure of more ring-shaped structures having a variable width, one ring-shaped diffusing structure having a variable width and each ring-shaped diffusing structure of more ring-shaped diffusing structures having a variable width, varies within at least one range of the following group of ranges:
  • variable width varies in a range of larger than 0.2 mm and equal or lower than 0.7 mm;
  • variable width varies in a range of larger than 0.3 mm and equal or lower than 0.7 mm;
  • variable width varies in a range of lower than 0.6 mm
  • variable width varies in a range of larger than 0.2 mm and equal or lower than 0.6 mm;
  • variable width varies in a range of larger than 0.3 mm and equal or lower than 0.6 mm;
  • variable width varies in a range of lower than 0.5 mm
  • variable width varies in a range of larger than 0.2 mm and equal or lower than 0.5 mm;
  • variable width varies in a range of larger than 0.3 mm and equal or lower than 0.5 mm.
  • the spectacle lens is characterized in that one ring-shaped structure having a variable surface power or each ring-shaped structure of more ring-shaped structures having a variable surface power provide a variable surface power to said spectacle lens which is different to a surface power of a lens surface comprising said one or more ring-shaped structure (s) having said variable surface power outside a domain occupied by said one or more ring-shaped structure (s) having said variable surface power, varying within at least one range of the following group of ranges:
  • Fig. 1 shows a digital twin of single vision spectacle lens 100 with five ring-shaped structures 101 to 105.
  • Fig. 2 shows a cross-sectional view of the digital twin of the single vision spectacle lens 100 of figure 1 having a front surface 131 and a back surface 133.
  • Auniform width w101 to w103 of a ring-shaped structure is limited by an inner onset, io101, io102, io103, and a respective outer onset, oo101, oo102, oo103.
  • a central zone width cw110 is shown.
  • the three ring-shaped structures 101 to 103 are shown in figure 2 compared to the five ring-shaped structures 101 to 105 shown in figure 1.
  • Fig. 3 shows a digital twin of a coated single vision spectacle lens 200 with five coated ring-shaped structures 201 to 205.210 is a coated central zone.
  • Fig. 4 shows a cross-sectional view of the digital twin of the coated single vision spectacle lens 200 of figure 3 having a coated front surface 231 and a coated back surface 233, coated with a coating 237.
  • a uniform width w201 to w203 of a coated ring-shaped structure is limited by an inner onset, io201, io202, io203, and a respective outer onset, oo201, oo202, oo203.
  • a central zone width cw210 is shown.
  • the three ring-shaped structures 201 to 203 are shown in figure 4 compared to the five ring-shaped structures 201 to 205 shown in figure 3.
  • Fig. 5 shows a digital twin of a single vision spectacle lens 300 with five ring-shaped diffusing structures 301 to 305.
  • Fig. 6 shows a cross-sectional view of digital twin of the single vision spectacle lens 300 of figure 5 having a front surface 331 and a back surface 333.
  • a uniform width w301 to w303 of a ring-shaped structure is limited by an inner onset, io301, io302, io303, and a respective outer onset, oo301, oo302, oo303.
  • a central zone width cw310 is shown.
  • the three ring-shaped diffusing structures 301 to 303 are shown in figure 6 compared to the five ring-shaped diffusing structures 301 to 305 shown in figure 5.
  • Table 1 below shows different calculated design characteristics of a digital twin of a spectacle lens, in the order of satisfaction of wearability of a respective spectacle lens evaluated by a wearer.
  • the subjects of a study evaluated said calculated design characteristics of said digital twin in a range from 1 to 10, wherein 10 equals to best possible wearability of respective a spectacle lens and 1 equals to the worst possible wearability of a respective spectacle lens.
  • a satisfaction of wearability greater or equal to 4.0 is considered as sufficient, hence children would probably accept such spectacle lenses with said satisfaction of wearability and would probably not to tend to dismiss the respective spectacle lens.
  • the lenses 1 to 9 in table 1 are therefore examples of a digital twin of a spectacle lens and a respective spectacle lens whereas spectacle lenses 10 to 16 are considered as reference spectacle lenses for the spectacle lenses 1 to 9 in reference to the satisfaction of wearability.
  • Table 1 Design characteristics of digital twins of spectacle lenses and respective spectacle lenses with the specific characterizations and wearer satisfaction and visual acuity when looking through the periphery of the lens.

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Abstract

The invention relates to a digital twin of a spectacle lens configured for the purpose of a use of the digital twin for manufacturing the spectacle lens comprising one ring-shaped structure or more ring-shaped structures or one ring-shaped diffusing structure or more ring-shaped diffusing structures and to a computer-implemented method configured for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens.

Description

Digital twin of a spectacle lens and spectacle lens Field of the invention
The present invention relates to a digital twin of a spectacle lens according to the preamble claim 1, to a computer-implemented method configured for calculating a digital twin of a spectacle lens according to the preamble of claim 8 and to a spectacle lens according to the preamble of claim 20.
Related prior art
WO 2019/166659 A1 discloses a spectacle lens comprising concentric rings, arranged as shown in figure 11b and described on page 20, lines 10 to 12.
CN 111103701 A discloses a spectacle lens comprising an annular cylindrical microstructure, arranged as shown in figure 1. The central optical area is circular having a radius of 5 mm to 10 mm, the center of the spectacle lens being the center of the circle. The annular cylindrical microstructure is located outside the central optical area having a radius between the one of the central optical area and 20 mm or more. The radial width of the annular cylindrical microstructures is 0.5 mm to 2 mm. The distance between the different cylindrical microstructure is 0.5 mm to 3 mm.
PCT/EP2022/053854 discloses a spectacle lens comprising ring-shaped focusing structures surrounding a central clear zone having a central clear zone width of 6 mm to 9.4 mm. The ring-shaped focusing structures have a width of equal or lower than 0.7 mm.
Problem to be solved
Based on PCT/EP2022/053854 the problem to be solved had been to provide a spectacle lens comprising different structures without causing discomfort to a spectacle lens wearer.
Summary of the invention
The problem has been solved by the digital twin according to claim 1, the computer-implemented method configured for calculating a digital twin of a spectacle lens according to claim 8 and the spectacle lens according to claim 20.
Advantageous embodiments of the invention are the subject-matter of the dependent claims.
The digital twin of the spectacle lens according to the invention is configured for the purpose of a use of the digital twin for manufacturing the spectacle lens and comprises
- one ring-shaped structure or more ring-shaped structures or
- one ring-shaped diffusing structure or more ring-shaped diffusing structures
each having a respective uniform width, and at least one first additional feature of the following group of first features:
(i) a central zone having a central zone width within a range of 6 mm to 9.4 mm and said uniform width being equal to or lower than 0.7 mm;
(ii) said uniform width being lower than 0.5 mm;
(iii) a surface-based fill factor defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said more ring-shaped structures or of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped structure of said more ring-shaped structures or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a surface area of a peripheral zone, said surface-based fill factor being larger than 17 %and equal or lower than 70%for said uniform width of said more ring-shaped structures or said more ring-shaped diffusing structures in a range of 0.6 mm to 0.7 mm;
(iv) a surface-based fill factor defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said more ring-shaped structures or of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped structure of said more ring-shaped structures or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a surface area of a peripheral zone, said surface-based fill factor being larger than 15 %and equal or lower than 60%for said uniform width of said more ring-shaped structures or said more ring-shaped diffusing structures in a range of 0.5 mm to 0.6 mm;
(v) a surface-based fill factor defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said more ring-shaped structures or of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped structure of said more ring-shaped structures or said an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a surface area of a peripheral zone, said surface-based fill factor being larger than 6 %and equal or lower than 50 %for said uniform width of said more ring-shaped structures or said more ring-shaped diffusing structures lower than 0.5 mm,
said digital twin being characterized in comprising at least one second additional feature of the following group of second features:
- one ring-shaped diffractive structure or more ring-shaped diffractive structures,
- one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power,
- one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
- one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width,
each of said second features
a) instead of said one ring-shaped structure, instead of said more ring-shaped structures or instead of at least one of said more ring-shaped structures, or
b) instead of said one ring-shaped diffusing structure, instead of said more ring-shaped diffusing structures or instead of a least one of said more ring-shaped diffusing structures, or
c) additionally to said one ring-shaped structure or additionally to said more ring-shaped structures, or
d) additionally to said one ring-shaped diffusing structure or additionally to said more ring-shaped diffusing structures.
A “digital twin of a spectacle lens” shall be defined analogously as in ISO 13666: 2019 (E) , section 3.5.2 (spectacle lens) , as a digital twin of an ophthalmic lens worn, when transferred in physical reality, in front of, but not in contact with, the eyeball. The digital twin of the spectacle lens is for the purpose of a use of the digital twin for manufacturing the spectacle lens. The digital twin of a spectacle lens is a mathematical description of a front surface of the spectacle lens, a mathematical description of a back surface of the spectacle lens, said mathematical descriptions including a relative orientation of the front surface and the back surface and a refractive index of an optical material between the front surface and the back surface. A front surface of said digital twin of said spectacle lens is defined analogously as in ISO 13666: 2019 (E) , section 3.2.13, as a surface which when said digital twin is transferred in physical reality is intended to be fitted away from the eye. A back surface of said digital twin of said spectacle lens is defined analogously as in ISO 13666: 2019 (E) , section 3.2.14, as a surface which when said digital twin is transferred in physical reality is intended to be fitted nearer to the eye. The digital twin of said spectacle lens is transferred in physical reality by manufacturing said spectacle lens. The refractive index of the optical material included in the mathematical descriptions preferably is a uniform refractive index. The refractive index of the optical material included in the mathematical descriptions preferably is the refractive index the spectacle lens has when the digital twin of the spectacle lens has been transferred in physical reality.
The digital twin of the spectacle lens may, for the purpose of a use of the digital twin for manufacturing the spectacle lens, additionally or alternatively, be one of the following:
- an analytical description or an analytical model describing or representing said spectacle lens. Said analytical description or said analytical model is for the purpose of a use for manufacturing said spectacle lens. Said analytical description or said analytical model preferably is a piecewise representation and comprises (a) a mathematical formula describing a lens surface of a front surface of said spectacle lens not considering one or more ring-shaped structure (s) or not considering one or more rings-shaped diffusing structure (s) , (b) a mathematical formula describing a lens surface of a back surface of said spectacle lens not considering one or more ring-shaped structure (s) or not considering one or more rings-shaped diffusing structure (s) , (c) (i) a piecewise mathematical formula describing one ring-shaped structure or one ring-shaped diffusing structure, in particular a surface, preferably as could be seen in the examples given below in the sense of surface shape, form or topography, aposition and a domain of said one ring-shaped structure or said one ring-shaped diffusing structure or (c) (ii) piecewise mathematical formulas describing each of said more ring-shaped structures or each of said ring-shaped diffusing structure, in particular a surface, preferably as could be seen in the examples given below in the sense of surface shape, form or topography, a position and a domain of each of said more ring-shaped structures or of each of said more ring-shaped diffusing structures, (d) a mathematical formula describing a relative orientation of the lens surface of the front surface to the lens surface of the back surface, and (e) a mathematical formula describing a refractive index of an optical material. Alternatively, said analytical description or said analytical model is a piecewise representation and comprises (a) a mathematical formula or  mathematical formulas describing a lens surface of a front surface considering optionally one ring-shaped structure or one ring-shaped diffusing structure or each of more ring-shaped structures or each of more ring-shaped diffusing structures, preferably the mathematical formula (s) describing the lens surface of the front surface inclusive one or more ring-shaped structure (s) or inclusive one or more ring-shaped diffusing structure (s) , (b) a mathematical formula or mathematical formulas describing a lens surface of a back surface considering optionally one ring-shaped structure or one ring-shaped diffusing structure or each of more ring-shaped structures or each of more ring-shaped diffusing structures, preferably the mathematical formula describing the lens surface of the back surface, (c) a mathematical formula describing a relative orientation of the lens surface of the front surface to the lens surface of the back surface, and (d) a mathematical formula describing a refractive index of a digital twin of a spectacle lens;
- an analytical description or an analytical model describing or representing said spectacle lens, said analytical description or said analytical model additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure (s) or said one or more ring-shaped diffusing structure (s) ;
- in the form of an analytical description or an analytical model representing said spectacle lens, said analytical description or said analytical model being for the purpose of a use for manufacturing said spectacle lens;
- in the form of an analytical description or an analytical model representing said spectacle lens, said analytical description or said analytical model additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure (s) or said one or more ring-shaped diffusing structure (s) ;
- said analytical description or said analytical model being (i) computer-readable data or (ii) in the form of computer-readable data, said computer-readable data being for the purpose of a use for manufacturing said spectacle lens;
- said analytical description or said analytical model being (i) computer-readable data or (ii) in the form of computer-readable data, said computer-readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure (s) or said one or more ring-shaped diffusing structure (s) ;
- said analytical description or said analytical model being for the purpose of a use for manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal. The computer readable storage medium may be a non-transitory tangible computer-readable storage medium;
- numerical data describing or representing said spectacle lens. Said numerical data are for the purpose of a use for manufacturing said spectacle lens. Said numerical data preferably are comprising or being a conversion of said analytical description or said analytical model. Said numerical data preferably are comprising a pattern which comprises a) discrete x, y, z positions of or on a front surface of said spectacle lens and b) discrete x, y, z positions of or on a back surface of said spectacle lens. Said pattern comprising discrete x, y positions may be adapted or selected arbitrarily. Said numerical data comprises the function value of the analytical description or the  analytical model of said lens surface in each of said discrete x, y positions. The function value in each discrete x, y position, i.e., the discrete x, y, z positions, of the front and back surface are described in the same coordinate system or a relative orientation of the coordinate systems of the lens front surface and the lens back surface is comprised in said numerical data. A refractive index of an optical material is comprised in said numerical data;
- numerical data describing or representing said spectacle lens, said numerical data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure (s) or said one or more ring-shaped diffusing structure (s) ;
- in the form of numerical data describing or representing said spectacle lens, said numerical data being for the purpose of a use for manufacturing said spectacle lens;
- in the form of numerical data describing or representing said spectacle lens, said numerical data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure (s) or said one or more ring-shaped diffusing structure (s) ;
- said numerical data being (i) computer-readable data or (ii) in the form of computer-readable data, said computer-readable data being for the purpose of a use for manufacturing said spectacle lens;
- said numerical data being (i) computer-readable data or (ii) in the form of computer-readable data, said computer-readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure (s) or said one or more ring-shaped diffusing structure (s) ;
- said numerical data being for the purpose of a use for manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal. The computer-readable storage medium may be a non-transitory tangible computer-readable storage medium;
- computer-readable data describing or representing said spectacle lens, said computer-readable data being for the purpose of a use for manufacturing said spectacle lens;
- computer-readable data describing or representing said spectacle lens, said computer-readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure (s) or said one or more ring-shaped diffusing structure (s) ;
- in the form of computer-readable data describing or representing said spectacle lens, said computer-readable data being for the purpose of a use for manufacturing said spectacle lens;
- in the form of computer-readable data describing or representing said spectacle lens, said computer-readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure (s) or said one or more ring-shaped diffusing structure (s) ;
- said computer-readable data being for the purpose of a use for manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal. The computer-readable storage medium may be a non-transitory tangible computer-readable storage medium;
- a virtual representation of said spectacle lens, said virtual representation being for the purpose of a use for manufacturing said spectacle lens;
- a virtual representation of said spectacle lens in the form of computer-readable data being for the purpose of a use for manufacturing said spectacle lens;
- a virtual representation of said spectacle lens in the form of computer-readable data, said computer-readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure (s) or said one or more ring-shaped diffusing structure (s) ;
- said virtual representation of said spectacle lens being for the purpose of a use for manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal. The computer-readable storage medium may be a non-transitory tangible computer-readable storage medium;
- said virtual representation of said spectacle lens in the form of computer-readable data being for the purpose of manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal. The computer-readable storage medium may be a non-transitory tangible computer-readable storage medium.
A “spectacle lens” results from a transfer of a digital twin of a spectacle lens in physical reality. The digital twin of the spectacle lens is transferred in physical reality by manufacturing the spectacle lens. The spectacle lens is as defined in ISO 13666: 2019 (E) , section 3.5.2, an ophthalmic lens (3.5.1) worn in front of, but not in contact with, the eyeball. A front surface of the spectacle lens is defined as in ISO 13666: 2019 (E) , section 3.2.13, as surface of the spectacle lens intended to be fitted away from the eye. A back surface of the spectacle lens is defined as in ISO 13666: 2019 (E) , section 3.2.14, as surface of the spectacle lens intended to be fitted nearer to the eye.
The spectacle lens preferably is a finished spectacle lens, the finished spectacle lens as defined in ISO 13666: 2019 (E) , section 3.8.7 (finished lens) , as lens (3.5.2) of which both sides have their final optical surface. The finished spectacle lens may be either an uncut spectacle lens as defined in ISO 13666: 2019 (E) , section 3.8.8 (uncut lens) or an edged spectacle lens as defined in ISO 13666: 2019 (E) , section 3.8.9 (edged lens) . The spectacle lens preferably is selected from at least one of
- a single-vision spectacle lens as defined in ISO 13666: 2019 (E) , section 3.7.1 (single-vision lens) ,
- a position-specific single-vision spectacle lens as defined in ISO 13666: 2019 (E) , section 3.7.2 (position-specific single-vision lens) ,
- a multifocal spectacle lens as defined in ISO 13666: 2019 (E) , section 3.7.3 (multifocal lens) ,
- a bifocal spectacle lens as defined in ISO 13666: 2019 (E) , section 3.7.4 (bifocal lens) ,
- a trifocal spectacle lens as defined in ISO 13666: 2019 (E) , section 3.7.5 (trifocal lens) ,
- a fused multifocal spectacle lens as defined in ISO 13666: 2019 (E) , section 3.7.6 (fused multifocal lens) ,
- a power-variation spectacle lens as defined in ISO 13666: 2019 (E) , section 3.7.7 (power-variation lens) ,
- a progressive-power spectacle lens as defined in ISO 13666: 2019 (E) , section 3.7.8 (progressive-power lens) .
The spectacle lens further preferably is selected from at least one of a single-vision spectacle lens and a position-specific single-vision spectacle lens.
The spectacle lens comprises or is based on an optical material. The optical material is as defined in ISO 13666: 2019 (E) , section 3.3.1, a transparent material capable of being manufactured into optical components. The optical material preferably comprises a thermosetting hard resin as defined in ISO 13666: 2019 (E) , section 3.3.3, or a thermoplastic hard resin as defined in ISO 13666: 2019 (E) , section 3.3.4. The optical material may additionally or alternatively comprise a glass as defined in ISO 13666: 2019 (E) , section 3.3.2. The optical material preferably is having a uniform refractive index.
A structure shall be considered as “ring-shaped” if it surrounds a structure-free zone and there is a path within the structure which runs from a starting point within the structure around the structure-free zone and to the starting point again. A structure may comprise one structure or more structures. Ring-shaped may comprise circular, elliptical or otherwise curved rings encircling a domain of a lens surface, i.e., a front surface or a back surface, of a spectacle lens. A domain encircled by one ring-shaped structure, or a domain encircled by a ring-shaped structure out of more ring-shaped structures preferably comprises directly adjacent to said ring-shaped structure no further structure. A domain encircled by one ring-shaped diffusing structure, or a domain encircled by a ring-shaped diffusing structure out of more ring-shaped diffusing structures preferably comprises directly adjacent to said ring-shaped diffusing structure no further structure.
“One ring-shaped structure of a digital twin of a spectacle lens” is a mathematical description of a surface of one ring-shaped structure, said mathematical description not considering a mathematical description of a lens surface of the digital twin of the spectacle lens comprising the one ring-shaped structure, for example not considering a mathematical description of a front surface comprising the ring-shaped structure. One ring-shaped structure of the digital twin of the spectacle lens is a single ring-shaped structure of said digital twin.
For characterizing the ring-shaped structure and not the lens surface of the digital twin of the spectacle lens comprising the ring-shaped structure, the mathematical description of the lens surface comprising the ring-shaped structure is a separate mathematical description from the mathematical description of the surface of the ring-shaped structure itself. The surface of the ring-shaped structure and the lens surface of the digital twin of the spectacle lens comprising the ring-shaped structure are mathematically described piecewise.
The surface of the ring-shaped structure of the digital twin of the spectacle lens may be selected from at least one of the following surfaces or may be pieced together from parts of at least one of the following surfaces:
- a part of a spherical surface, a spherical surface as defined in ISO 13666: 2019 (E) , section 3.4.1;
- a cylindrical surface as defined in ISO 13666: 2019 (E) , section 3.4.2;
- a part of a cylindrical surface;
- a part of an aspherical surface, an aspherical surface as defined in ISO 13666: 2019 (E) , section 3.4.3;
- a part of a toroidal surface, a toroidal surface as defined in ISO 13666: 2019 (E) , section 3.4.6;
- a part of an atoroidal surface, an atoroidal surface as defined in ISO 13666: 2019 (E) , section 3.4.7;
- a power-variation surface defined analogously as in ISO 13666: 2019 (E) , section 3.4.10;
- a part of a power-variation surface.
The ring-shaped structure of the digital twin of the spectacle lens has a surface power which is different to a surface power of a lens surface of the digital twin of the spectacle lens comprising the ring-shaped structure outside a domain occupied by the ring-shaped structure. The surface power of the ring-shaped structure shall be defined analogously as in ISO 13666: 2019 (E) , section 3.10.4 (surface power) , as a local ability of the surface of the ring-shaped structure to change the calculated vergence of a digitally represented bundle of rays incident at the surface of the ring-shaped structure. The surface power of the ring-shaped structure preferably is analogously as in note 1 to the entry in ISO 13666: 2019 (E) , section 3.10.4, determined from a radius or radii of the surface of the ring-shaped structure and a refractive index of a material of the ring-shaped structure, and is calculated for digitally represented light incident or emergent in air. The refractive index may be an actual refractive index of a material of the ring-shaped structure or a nominal value. The refractive index of the material of the ring-shaped structure preferably is assumed to be a same as a refractive index of an optical material of a digital twin of a spectacle lens.
The surface power of a lens surface of the digital twin of the spectacle lens shall be defined analogously as in ISO 13666: 2019 (E) , section 3.10.4 (surface power) , as a local ability of the lens surface of a digital twin of a spectacle lens to change the calculated vergence of a digitally represented bundle of rays incident at the lens surface. The surface power of the lens surface is analogously as in note 1 to the entry in ISO 13666: 2019 (E) , section 3.10.4, determined from a radius or radii of the lens surface of the digital twin of the spectacle lens and a refractive index of an optical material of the digital twin of the spectacle lens, and is calculated for digitally represented light incident or emergent in air. The refractive index may be an actual refractive index of the optical material of the digital twin of the spectacle lens or a nominal value.
“One ring-shaped structure of a spectacle lens” results from transferring a digital twin of a spectacle lens comprising said one ring-shaped structure in physical reality, by manufacturing said spectacle lens. The surface of the ring-shaped structure of the spectacle lens may be selected from at least one of the following surfaces or may be pieced together from parts of at least one of the following surfaces:
- a part of a spherical surface, a spherical surface as defined in ISO 13666: 2019 (E) , section 3.4.1;
- a cylindrical surface as defined in ISO 13666: 2019 (E) , section 3.4.2;
- a part of a cylindrical surface;
- a part of an aspherical surface, an aspherical surface as defined in ISO 13666: 2019 (E) , section 3.4.3;
- a part of a toroidal surface, a toroidal surface as defined in ISO 13666: 2019 (E) , section 3.4.6;
- a part of an atoroidal surface, an atoroidal surface as defined in ISO 13666: 2019 (E) , section 3.4.7;
- a power-variation surface as defined in ISO 13666: 2019 (E) , section 3.4.10;
- a part of a power-variation surface.
The ring-shaped structure of the spectacle lens has a surface power which is different to a surface power of a lens surface of the spectacle lens comprising the ring-shaped structure outside a domain occupied by the ring-shaped structure. The surface power of the ring-shaped structure is defined as in ISO 13666: 2019 (E) , section 3.10.4 (surface power) , as a local ability of a surface of the ring-shaped structure to change the vergence of a bundle of rays incident at the surface. The surface power of the ring-shaped structure preferably is as in note 1 to the entry in ISO 13666: 2019 (E) , section 3.10.4, determined from a radius or radii of the surface of the ring-shaped structure and a refractive index (3.1.5) of a material of the ring-shaped structure, and is calculated for light (3.1.2) incident or emergent in air. The refractive index may be an actual refractive index of the material of the ring-shaped structure or a nominal value. The refractive index of the material of the ring-shaped structure preferably is assumed to be a same as a refractive index of an optical material of a spectacle lens. The surface power of a lens surface of the spectacle lens is defined as in ISO 13666: 2019 (E) , section 3.10.4, as a local ability of a finished surface of a spectacle lens to change the vergence of a bundle of rays incident at the finished surface. The surface power of the lens surface is as in note 1 to the entry in ISO 13666: 2019 (E) , section 3.10.4, determined from a radius or radii of the finished surface of the spectacle lens and a refractive index (3.1.5) of an optical material (3.3.1) of the spectacle lens, and is calculated for light (3.1.2) incident or emergent in air. The refractive index may be an actual refractive index of the optical material or a nominal value.
“More ring-shaped structures of a digital twin of a spectacle lens” is a mathematical description of a surface of each ring-shaped structure, each mathematical description not considering a mathematical description of a lens surface of the digital twin of the spectacle lens comprising the more ring-shaped structures. For characterizing the more ring-shaped structures and not the lens surface of the digital twin of the spectacle lens comprising the more ring-shaped structures, the mathematical description of the lens surface comprising the ring-shaped structures is a separate mathematical description from the mathematical description of each surface of the more ring-shaped structures themselves. Each surface of the more ring-shaped structures and the lens surface of the digital twin of the spectacle lens comprising the more ring-shaped structures are mathematically described piecewise.
Each surface of the more ring-shaped structures of the digital twin of the spectacle lens may be selected from at least one of the following surfaces or may be pieced together from parts of at least one of the following surfaces:
- a part of a spherical surface, a spherical surface as defined in ISO 13666: 2019 (E) , section 3.4.1;
- a cylindrical surface as defined in ISO 13666: 2019 (E) , section 3.4.2;
- a part of a cylindrical surface;
- a part of an aspherical surface, an aspherical surface as defined in ISO 13666: 2019 (E) , section
3.4.3;
- a part of a toroidal surface, a toroidal surface as defined in ISO 13666: 2019 (E) , section 3.4.6;
- a part of an atoroidal surface, an atoroidal surface as defined in ISO 13666: 2019 (E) , section 3.4.7;
- a power-variation surface defined analogously as in ISO 13666: 2019 (E) , section 3.4.10;
- a part of a power-variation surface.
The surfaces of the more ring-shaped structures of the digital twin of the spectacle lens each may be selected from a same surface, e.g., a same surface of the before mentioned, or may be pieced together from parts of a same surface, e.g., parts of a same surface of the before mentioned. Alternatively, each surface of the more ring-shaped structures of the digital twin of the spectacle lens may be different to one another, e.g., said different surfaces may be selected from the before mentioned, or may be pieced together from parts of different surfaces, e.g., parts of different surfaces of the before mentioned. Alternatively, at least one surface of the more ring-shaped structures of the digital twin of the spectacle lens may be different to other surfaces of the more ring-shaped structures, e.g., each of said surface may be selected from the before mentioned or pieced together from parts of the before mentioned such that at least one surface is different from the other surfaces of the more ring-shaped structures.
The more ring-shaped structures of the digital twin of the spectacle lens each have a surface power which is different to a surface power of a lens surface of the digital twin of the spectacle lens comprising the more ring-shaped structures outside each domain occupied by each of the more ring-shaped structures. The surface power of each ring-shaped structure of the more ring-shaped structures shall be defined analogously as in ISO 13666: 2019 (E) , section 3.10.4 (surface power) , as a local ability of each surface of the more ring-shaped structures to change the calculated vergence of a digitally represented bundle of rays incident at each surface of the more ring-shaped structures. The surface power of the more ring-shaped structures preferably is analogously as in note 1 to the entry in ISO 13666: 2019 (E) , section 3.10.4, determined from a radius or radii of each surface of the more ring-shaped structures and a refractive index of a material of each ring-shaped structure, and is calculated for digitally represented light incident or emergent in air. The refractive index may be an actual refractive index of a material of each ring-shaped structure or a nominal value. The refractive index of the material of each ring-shaped structure preferably is assumed to be a same as a refractive index of an optical material of a digital twin of a spectacle lens. The surface power of a lens surface of the digital twin of the spectacle lens shall be defined analogously as in ISO 13666: 2019 (E) , section 3.10.4 (surface power) .
“More ring-shaped structures of a spectacle lens” results from transferring a digital twin of a spectacle lens comprising the more ring-shaped structures of in physical reality, by manufacturing said spectacle lens. The surfaces of the more ring-shaped structures of the spectacle lens may be selected from at least one of the following surfaces or may be pieced together from parts of at least one of the following surfaces:
- a part of a spherical surface, a spherical surface as defined in ISO 13666: 2019 (E) , section 3.4.1;
- a cylindrical surface as defined in ISO 13666: 2019 (E) , section 3.4.2;
- a part of a cylindrical surface;
- a part of an aspherical surface, an aspherical surface as defined in ISO 13666: 2019 (E) , section
3.4.3;
- a part of a toroidal surface, a toroidal surface as defined in ISO 13666: 2019 (E) , section 3.4.6;
- a part of an atoroidal surface, an atoroidal surface as defined in ISO 13666: 2019 (E) , section 3.4.7;
- a power-variation surface as defined in ISO 13666: 2019 (E) , section 3.4.10;
- a part of a power-variation surface.
The surfaces of the more ring-shaped structures of the spectacle lens each may be selected from a same surface, e.g., a same surface of the before mentioned, or may be pieced together from parts of a same surface, e.g., parts of a same surface of the before mentioned. Alternatively, each surface of the more ring-shaped structures of the spectacle lens may be different to one another, e.g., said different surfaces may be selected from the before mentioned, or may be pieced together from parts of different surfaces, e.g., parts of different surfaces of the before mentioned. Alternatively, at least one surface of the more ring-shaped structures of the spectacle lens may be different to other surfaces of the more ring-shaped structures, e.g., each of said surface may be selected from the before mentioned or pieced together from parts of the before mentioned such that at least one surface is different from the other surfaces of the more ring-shaped structures.
The more ring-shaped structures of the spectacle lens each have a surface power which is different to a surface power of a lens surface of the spectacle lens comprising the more ring-shaped structures outside each domain occupied by each of said ring-shaped structures. The surface power of each of the more ring-shaped structures is defined as in ISO 13666: 2019 (E) , section 3.10.4 (surface power) , as a local ability of each surface of the more ring-shaped structures to change the vergence of a bundle of rays incident at each surface. The surface power of each of the more ring-shaped structures preferably is as in note 1 to the entry in ISO 13666: 2019 (E) , section 3.10.4, determined from a radius or radii of each surface of the more ring-shaped structures and a refractive index (3.1.5) of a material of each of the more ring-shaped structures, and is calculated for light (3.1.2) incident or emergent in air. The refractive index may be an actual refractive index of the material of each of the more ring-shaped structures or a nominal value. The refractive index of the material of each of the more ring-shaped structures preferably is assumed to be a same as a refractive index of an optical material of a spectacle lens.
The surface power of a lens surface of the spectacle lens is defined as in ISO 13666: 2019 (E) , section 3.10.4 (surface power) .
“One ring-shaped diffusing structure of a digital twin of a spectacle lens” constitute one optical element that is made of any material that diffuses or scatters light in some manner to transmit soft light. Diffuse light can be easily obtained by reflecting light from a white surface, while more compact diffusing structures may use translucent material, including ground glass, Teflon, holographs, opal glass, and greyed glass. One ring-shaped diffusing structure may be regarded as one ring-shaped light modulating cell, preferably within a lens surface of said digital twin, said light modulating cell diffusing light as disclosed for example in WO 2020/261213 A1 or as one ring-shaped scattering centre, preferably within a lens surface of said digital twin, said scattering centre as disclosed for example in WO 2020/180817 A1 or in WO 2022/251713 A1.
“One ring-shaped diffusing structure of a spectacle lens” results from transferring of a digital twin of a spectacle lens comprising said one ring-shaped diffusing structure in physical reality, by manufacturing said spectacle lens.
“More ring-shaped diffusing structures of a digital twin of a spectacle lens” may be regarded as more than one of the before mentioned ring-shaped diffusing structures.
“More ring-shaped diffusing structures of a spectacle lens” results from transferring of a digital twin of a spectacle lens comprising said more ring-shaped diffusing structure in physical reality, by manufacturing said spectacle lens.
A “lens surface of a digital twin of a spectacle lens” is a mathematical description of a front surface of the digital twin of the spectacle lens or a mathematical description of a back surface of the digital twin of the spectacle lens. The mathematical description of the front surface and the mathematical description of the back surface are piecewise mathematical descriptions, not considering a piecewise mathematical description of one ring-shaped structure, one ring-shaped diffusing structure, or of each ring-shaped structure of more ring-shaped structures or each ring-shaped diffusing structure of more ring-shaped diffusing structures. The lens surface of the front surface and/or the lens surface of the back surface of the digital twin of the spectacle lens each is as defined in ISO 13666: 2019 (E) , section 3.4 or is defined analogously as in ISO 13666: 2019 (E) , section 3.4. The lens surface may be formed as one of the following:
- as a spherical surface as defined in ISO 13666: 2019 (E) , section 3.4.1,
- as a cylindrical surface as defined in ISO 13666: 2019 (E) , section 3.4.2,
- as an aspherical surface as defined in ISO 13666: 2019 (E) , section 3.4.3,
- as a toroidal surface as defined in ISO 13666: 2019 (E) , section 3.4.6,
- as an atoroidal surface as defined in ISO 13666: 2019 (E) , section 3.4.7,
- as a power-variation surface defined analogously as in ISO 13666: 2019 (E) , section 3.4.10.
The lens surface of the front surface and the lens surface of the back surface of the digital twin of the spectacle lens may be formed of a same lens surface or of a different lens surface.
A “lens surface of a spectacle lens” results from a transfer of a lens surface of a digital twin of the spectacle lens in physical reality, by manufacturing the spectacle lens. The lens surface of the front surface and/or the lens surface of the back surface of the spectacle lens each is as defined in ISO 13666: 2019 (E) , section 3.4 and may be formed as one of the following:
- as a spherical surface as defined in ISO 13666: 2019 (E) , section 3.4.1,
- as a cylindrical surface as defined in ISO 13666: 2019 (E) , section 3.4.2,
- as an aspherical surface as defined in ISO 13666: 2019 (E) , section 3.4.3,
- as a toroidal surface as defined in ISO 13666: 2019 (E) , section 3.4.6,
- as an atoroidal surface as defined in ISO 13666: 2019 (E) , section 3.4.7,
- as a power-variation surface as defined in ISO 13666: 2019 (E) , section 3.4.10.
A “uniform width of one ring-shaped structure or of one ring-shaped diffusing structure” designates an expansion of said one ring-shaped structure or said one ring-shaped diffusing structure along a direction perpendicular to its circumferential direction as determined between onsets of said one ring-shaped structure or of said one ring-shaped diffusing structure. An ” onset of one ring-shaped  structure” represents an inner onset (oi) , i.e., a first position and an outer onset (oo) , i.e., a last position in which a surface of said one ring-shaped structure deviates from a surface, preferably in the sense of surface shape, form or topography, of a lens surface of a digital twin of spectacle lens or of a lens surface of a spectacle lens, each comprising said one ring-shaped structure along the direction of the uniform width of said ring-shaped structure. An ” onset of one ring-shaped diffusing structure” represents an inner onset, i.e., a first position, and an outer onset, i.e., a last position, in which said one ring-shaped diffusing structure changes a calculated transmission of a digital twin of a spectacle lens or a transmission of a spectacle lens along the direction of the uniform width of said ring-shaped diffusing structure. Throughout the description it shall be understood that an inner onset is an onset that preferably is closer to a central zone and an outer onset preferably is further away from a central zone.
A uniform width of one ring-shaped structure or of one ring-shaped diffusing structure may alternatively comprise that in each tangential direction an expansion of said one ring-shaped structure or said one ring-shaped diffusing structure limited by a respective inner onset and a respective outer onset is of a same or uniform width. Atangential direction shall be any direction from an optical centre or a fitting point of the digital twin of a spectacle lens or of a spectacle lens radially outwards. The optical centre of a digital twin of a spectacle lens is defined analogously as in ISO 13666: 2019 (E) , section 3.2.15, as an intersection of the optical axis with the front surface of the digital twin. The optical centre of a spectacle lens is as defined in ISO 13666: 2019 (E) , section 3.2.15, an intersection of the optical axis (3.1.8) with the front surface (3.2.13) of a lens (3.5.2) . The fitting point of a digital twin of a spectacle lens is defined analogously as in ISO 13666: 2019 (E) , section 3.2.34, as a point on the front surface of the digital twin to be stipulated by the manufacturer for virtually positioning the digital twin in front of an eye. The fitting point of a spectacle lens is as defined in ISO 13666: 2019 (E) , section 3.2.34, a point on the front surface (3.2.13) of a lens (3.5.2) or blank (3.8.1) stipulated by the manufacturer for positioning the lens in front of the eye.
A “uniform width of more ring-shaped structures or of more ring-shaped diffusing structures” designates an expansion of each of said more ring-shaped structures or of each of said more ring-shaped diffusing structures along a direction perpendicular to their respective circumferential direction as determined between respective onsets of each of said more ring-shaped structures or of each of said more ring-shaped diffusing structures. A “respective onset of each of said more ring-shaped structures” represents each inner onset of each ring-shaped structure of said more ring-shaped structures, i.e., each first position and each outer onset of each ring-shaped structure of said more ring-shaped structures, i.e., each last position in which a surface of said one ring-shaped structure deviates from a surface, each preferably in the sense of surface shape, form or topography, of a lens surface of a digital twin of a spectacle lens or a spectacle lens, each comprising said more ring-shaped structure, along the direction of the respective uniform widths of said more ring-shaped structures. An ” onset of one ring-shaped diffusing structure” represents each inner onset, i.e., each first position, and each outer onset, i.e., each last position, in which each of said more ring-shaped diffusing structure changes a calculated transmission of digital twin of a spectacle lens or a  transmission of a spectacle lens, along the direction of the respective uniform widths of said more ring-shaped diffusing structures.
A uniform width of each of said more ring-shaped structures or of each of said more ring-shaped diffusing structures may alternatively comprise that in each tangential direction an expansion of each ring-shaped structure of said more ring-shaped structure or each ring-shaped diffusing structure of said more ring-shaped diffusing structures each limited by a respective inner onset and a respective outer onset is of a same or uniform width. A tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of the spectacle lens or the spectacle lens radially outwards.
A “central zone” is a domain of a lens surface, i.e., a front surface and/or a back surface, of a digital twin of a spectacle lens or a spectacle lens not comprising one or more ring-shaped structure (s) or not comprising one or more ring-shaped diffusing structure (s) . One ring-shaped structure or an innermost of said more ring-shaped structures is adjacent to said central zone, thereby encircling said central zone. Alternatively, one ring-shaped diffusing structure or an innermost of said more ring-shaped diffusing structures is adjacent to said central zone, thereby encircling said central zone. Preferably, said central zone comprise at least one of an optical centre and a fitting point of the digital twin of the spectacle lens or the spectacle lens.
A “central zone width” is a maximum expansion of a domain of said central zone on a lens surface of a digital twin of a spectacle lens or a spectacle lens, i.e., a respective front surface and/or a respective back surface thereof, limited by two inner onsets of one ring-shaped structure or one ring-shaped diffusing structure in opposite tangential directions or limited by two inner onsets of an innermost ring-shaped structure of more ring-shaped structures or by two inner onset of an innermost ring-shaped diffusing structure of more ring-shaped diffusing structures in opposite tangential directions.
Alternatively, a central zone width may be a maximum expansion of a domain of said central zone on a lens surface of a digital twin of a spectacle lens or a spectacle lens, i.e., a respective front surface and/or a respective back surface thereof, limited by the respective before mentioned two inner onsets along each line through an optical centre or a fitting point of the spectacle lens.
A central zone with a central zone width within a range of 6 mm to 9.4 mm has the advantage that a small central zone, e.g., 6 mm increases the probable efficacy of the spectacle lens for the reduction of progression of myopia for the wearer. At the same time said small central zone decreases the acceptance of the spectacle lens by the wearer due to the decreased comfort of wearability of the spectacle lens. A large central zone, e.g., 9.4 mm decreases the probable efficacy of the spectacle lens for the reduction of progression of myopia for the wearer. At the same time said large central zone increases the acceptance of the spectacle lens by the wearer due to the increased comfort of wearability of the spectacle lens.
A “surface-based fill factor” is determined by a surface area ratio of a surface area of an innermost ring-shaped structure of more ring-shaped structures and a sum of said surface area of said said innermost ring-shaped structure of said more ring-shaped structures and a surface area of a  peripheral zone. A “surface-based fill factor” is determined by a surface area ratio of a surface area of an innermost ring-shaped diffusing structure of more ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a surface area of a peripheral zone.
In case a lens surface of a digital twin of a spectacle lens or a lens surface of a spectacle lens, i.e., a respective front surface and/or a respective back surface thereof, comprises one ring-shaped structure or one ring-shaped diffusing structure, a “peripheral zone” is additionally to a central zone a further domain of the respective lens surface, not comprising one or more ring-shaped structure (s) or not comprising one or more ring-shaped diffusing structure (s) . Said one ring-shaped structure or said one ring-shaped diffusing structure each is separating said central zone from said peripheral zone. In case said lens surface of said digital twin of said spectacle lens or of said spectacle lens comprises said one ring-shaped structure or said one ring-shaped diffusing structure said peripheral zone expands from an outer onset line of said one ring-shaped structure or from an outer onset line of said ring-shaped diffusing structure to an edge of said lens surface. The respective outer onset line passes along each outer onset of said one ring-shaped structure or each outer onset of said one ring-shaped diffusing structure, the respective outer onset line is thereby surrounded or encircled by said peripheral zone.
Throughout the description it shall be understood that an inner onset line is an onset line that preferably is closer to a central zone and an outer onset line preferably is further away from a central zone.
In case said one ring-shaped structure or said one ring-shaped diffusing structure is replaced by at least one selected from the group consisting of one ring-shaped diffractive structure, one ring-shaped structure having a variable surface power, one ring-shaped structure having a variable width and one ring-shaped diffusing structure having a variable width the before given definition of a peripheral zone shall apply analogously.
In case a lens surface of a digital twin of a spectacle lens or a lens surface of a spectacle lens, i.e., a respective front surface and/or a respective back surface thereof, comprises more ring-shaped structures or more ring-shaped diffusing structures, a “peripheral zone” is additionally to a central zone a further domain of the respective lens surface, not comprising one or more ring-shaped structure (s) or not comprising one or more ring-shaped diffusing structure (s) . In this case, the peripheral zone is the further domain not comprising one or more ring-shaped structure (s) or not comprising one or more ring-shaped diffusing structure (s) closest to a central zone and separated from the central zone by an innermost ring-shaped structure of said more ring-shaped structures or separated from the central zone by an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures. In case said lens surface of said digital twin of said spectacle lens or of said spectacle lens comprises said more ring-shaped structures said peripheral zone expands from an outer onset line of said innermost ring-shaped structure to an inner onset line of a closest neighbouring ring-shaped structure of said more ring-shaped structures. In case said lens surface of said digital twin of said spectacle lens or of said spectacle lens comprises said more ring-shaped diffusing structures said peripheral zone expands from an outer onset line of said innermost ring-shaped structure to an inner onset line of a  closest neighbouring ring-shaped diffusing structure of said more ring-shaped diffusing structures. The respective outer onset line passes along each outer onset of said innermost ring-shaped structure or each outer onset of said innermost ring-shaped diffusing structure, the respective outer onset line is thereby surrounded by said peripheral zone. The respective inner onset line passes along each inner onset of said closest neighbouring ring-shaped structure or each inner onset of said closest neighbouring ring-shaped diffusing structure, the respective inner onset line thereby limiting an expansion of said peripheral zone.
In case an innermost ring-shaped structure, optionally of said more ring-shaped structures, is closest neighbouring a ring-shaped diffusing-structure, optionally of said more ring-shaped diffusing structures, or in case an innermost ring-shaped diffusing structure, optionally of said more ring-shaped diffusing structures, is closest neighbouring a ring-shaped structure, optionally of said more ring-shaped structures, the before given definition for a peripheral zone in case of more ring-shaped structures or more ring-shaped diffusing structures shall apply analogously.
In case at least one of the group consisting of said innermost ring-shaped structure, said innermost ring-shaped diffusing structure, said closest neighbouring ring-shaped structure, and said closest neighbouring ring-shaped diffusing structure is replaced by at least one selected from the group consisting of one ring-shaped diffractive structure, one ring-shaped structure having a variable surface power, one ring-shaped structure having a variable width and one ring-shaped diffusing structure having a variable width the before given definition of a peripheral zone in case of more ring-shaped structures or more ring-shaped diffusing structures shall apply analogously.
A surface area of one ring-shaped structure or of an innermost ring-shaped structure of more ring-shaped structures is determined by an inner onset line and an outer onset line of said one ring-shaped structure or said innermost ring-shaped structure. The surface area of one ring-shaped diffusing structure or of an innermost ring-shaped diffusing structure of more ring-shaped diffusing structures is determined by an inner onset line and an outer onset line of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure. The inner onset line passes along each inner onset of said one ring-shaped structure or said innermost ring-shaped structure, the inner onset line is thereby surrounding or encircling a central zone. The inner onset line passes along each inner onset of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure, the inner onset line is thereby surrounding or encircling a central zone. The outer onset line passes along each outer onset of said one ring-shaped structure or said innermost ring-shaped structure, the outer onset line is thereby surrounded or encircled by a peripheral zone. The outer onset line passes along each outer onset of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure. The respective inner onset line and the respective outer onset line of said one ring-shaped structure or said innermost ring-shaped structure or the respective inner onset line and the respective outer onset line of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure each are enclosing a surface area along a lens surface, i.e., a front surface and/or back surface, of a digital twin of a spectacle lens or a spectacle lens, without structure (s) , said surface area is the surface area of said one ring-shaped structure or said innermost ring-shaped structure of said more ring-shaped  structures or is the surface area of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures.
In case at least one of said one ring-shaped structure, said one ring-shaped diffusing structure, said innermost ring-shaped structure, and said innermost ring-shaped diffusing structure is replaced by at least one selected from the group consisting of one ring-shaped diffractive structure, one ring-shaped structure having a variable surface power, one ring-shaped structure having a variable width and one ring-shaped diffusing structure having a variable width the before given definition of a respective surface area shall apply analogously.
In case a lens surface of a digital twin of a spectacle lens or a lens surface of a spectacle lens, i.e., a respective front surface and/or back surface thereof, each comprise more ring-shaped structures, a “surface area of a peripheral zone” is determined by an outer onset line of an innermost ring-shaped structure of said more ring-shaped structures and an inner onset line of a closest neighbouring ring-shaped structure of said more ring-shaped structures. In case a lens surface of a digital twin of a spectacle lens or a lens surface of a spectacle lens, i.e., a respective front surface and/or back surface thereof, each comprise more ring-shaped diffusing structures, a “surface area of a peripheral zone” is determined by an outer onset line of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and an inner onset line of a closest neighbouring ring-shaped diffusing structure of said more ring-shaped diffusing structures. Said inner onset line of said closest neighbouring ring-shaped structure or said inner onset line of said closest neighbouring ring-shaped diffusing structure each passes along each inner onset of said closest neighbouring ring-shaped structure or said closest ring-shaped diffusing structure, said respective inner onset line thereby surrounding and encircling the peripheral zone. The outer onset line of said innermost ring-shaped structure and the inner onset line of said closest neighbouring ring-shaped structure are enclosing a surface area along a lens surface of a digital twin of a spectacle lens or along a lens surface of a spectacle lens, each comprising said more ring-shaped structures, said surface area is the surface area of the peripheral zone. The outer onset line of said innermost ring-shaped diffusing structure and the inner onset line of said closest neighbouring ring-shaped diffusing structure are enclosing a surface area along a lens surface of a digital twin of a spectacle lens or along a lens surface of a spectacle lens, each comprising said more ring-shaped diffusing structures, said surface area is the surface area of the peripheral zone.
In case an innermost ring-shaped structure is neighbouring a closest ring-shaped diffusing structure, a surface area of a peripheral zone is determined by an outer onset line of the innermost ring-shaped structure and an inner onset line of a closest neighbouring ring-shaped diffusing structure. The outer onset line of said innermost ring-shaped structure and the inner onset line of said closest neighbouring ring-shaped diffusing structure are enclosing a surface area along a lens surface of a digital twin of a spectacle lens or along a lens surface a spectacle lens, each comprising said ring-shaped structure and said ring-shaped diffusing structure, said surface area is the surface area of the peripheral zone. In case an innermost ring-shaped diffusing structure is neighbouring a closest ring-shaped structure, a surface area of a peripheral zone is determined by an outer onset line of the innermost ring-shaped diffusing structure and an outer onset line of a closest neighbouring ring-shaped structure. The outer  onset line of said innermost ring-shaped diffusing structure and the inner onset line of said closest neighbouring ring-shaped structure are enclosing a surface area along a lens surface of a digital twin of a spectacle lens or along a lens surface of a spectacle lens, each comprising said ring-shaped diffusing structure and said ring-shaped structure, said surface area is the surface area of the peripheral zone.
In case of more ring-shaped structures or in case of more ring-shaped diffusing structures, the before given definition of a peripheral zone shall apply analogously when an innermost ring-shaped structure or an innermost ring-shaped diffusing structure is closest neighboured by a structure selected from one of
- one ring-shaped diffractive structure,
- one ring-shaped structure having a variable surface power,
- one ring-shaped structure having a variable width,
- one ring-shaped diffusing structure having a variable width.
The before given definition of a peripheral zone shall apply analogously in case
- one innermost ring-shaped diffractive structure, or
- one innermost ring-shaped structure having a variable surface power, or
- one innermost ring-shaped structure having a variable width, or
- one innermost ring-shaped diffusing structure having a variable width is closest neighboured by a structure selected from one of
- one ring-shaped structure,
- one ring-shaped diffusing structure,
- one ring-shaped diffractive structure,
- one ring-shaped structure having a variable surface power,
- one ring-shaped structure having a variable width,
- one ring-shaped diffusing structure having a variable width.
The surface-based fill-factor has the advantage to define a balance between wearability and manufacturing of a spectacle lens comprising at least two selected from the group consisting of said ring-shaped structure (s) , said ring-shaped diffusing structure (s) , said ring-shaped diffractive structure (s) , said ring-shaped structure (s) having a variable surface power, said ring-shaped structure (s) having a variable width, said ring-shaped diffusing structure (s) having a variable width. A surface-based fill factor greater than 59.2%results in a decrease of comfortable wearability of the spectacle lens but increases the probable efficacy of the spectacle lens for the reduction of progression of myopia for the wearer. A surface-based fill factor smaller than 56.1%results in a decrease of the probable efficacy of the spectacle lens for the reduction of progression of myopia for the wearer but increases the comfortable wearability of the spectacle lens. In other words, a well-defined balance between the wearability and the manufacturing of the inventive spectacle lens is achieved with a surface-based fill factor in the range of 34.6-59.2%. In particular, a surface-based fill factor of 46.4 to 47.7%is preferred.
“One ring-shaped diffractive structure of a digital twin of a spectacle lens” may have a diffractive surface described for example in EP 3 561 578 A1, paragraphs [0177] to [0180] , or in WO 2020/261213 A1, paragraph [00108] .
“One ring-shaped diffractive structure of a spectacle lens” results from transferring a digital twin of a spectacle lens comprising said one ring-shaped diffractive structure in physical reality, by manufacturing said spectacle lens.
“More ring-shaped diffractive structures of a digital twin of a spectacle lens” comprise more than one ring-shaped diffractive structures as described before.
“More ring-shaped diffractive structures of a spectacle lens” result from transferring a digital twin of a spectacle lens comprising said more ring-shaped diffractive structures in physical reality, by manufacturing said spectacle lens.
“One ring-shaped structure having a variable surface power on a digital twin of a spectacle lens” shall comprise that a surface power of said one ring-shaped structure, the surface power defined analogously as in ISO 13666: 2019 (E) , section 3.10.4, along a circumferential direction of said one ring-shaped structure is not uniform. Alternatively, one ring-shaped structure having a variable surface power shall mean that a surface power of said one ring-shaped structure along a direction perpendicular to a tangential direction is not uniform.
“One ring-shaped structure having a variable surface power on a spectacle lens” results from transferring a digital twin of a spectacle lens comprising said one ring-shaped structure having a variable surface power in physical reality, by manufacturing said spectacle lens. Avariable surface power of one ring-shaped structure shall mean that the surface power as defined in ISO 13666: 2019 (E) , section 3.10.4, along a circumferential direction of said one ring-shaped structure is not uniform. Alternatively, one ring-shaped structure having a variable surface power shall mean that a surface power of said one ring-shaped structure along a direction perpendicular to a tangential direction is not uniform.
“More ring-shaped structures each having a variable surface power on a digital twin of a spectacle lens” shall comprise that a surface power of each ring-shaped structure of said more ring-shaped structures, the surface power defined analogously as in ISO 13666: 2019 (E) , section 3.10.4, along a circumferential direction of each ring-shaped structure is not uniform. Alternatively, more ring-shaped structures having a variable surface power shall mean that a surface power of each ring-shaped structure of said more ring-shaped structures along a direction perpendicular to a tangential direction is not uniform.
“More ring-shaped structures each having a variable surface power on a spectacle lens” , results from transferring a digital twin of a spectacle lens comprising said more ring-shaped structures each having  a variable surface power in physical reality, by manufacturing said spectacle lens. A variable surface power of each ring-shaped structure of said more ring-shaped structures shall mean that the surface power as defined in ISO 13666: 2019 (E) , section 3.10.4, along a circumferential direction of each ring-shaped structure of said more ring-shaped structures is not uniform. Alternatively, more ring-shaped structure having a variable surface power shall mean that a surface power of each ring-shaped structure of said more ring-shaped structures along a direction perpendicular to a tangential direction is not uniform.
“One ring-shaped structure having a variable width on a digital twin of a spectacle lens” shall comprise the definition provided before for one ring-shaped structure. A “variable width of one ring-shaped structure” designates a variable expansion of said one ring-shaped structure along different directions perpendicular to a circumferential direction as determined between onsets, i.e., an inner and an outer onset, of said one ring-shaped structure. An ” onset of one ring-shaped structure” represents an inner onset, i.e., a first position and an outer onset, i.e., a last position in which a surface, preferably in the sense of surface shape, form or topography, of said one ring-shaped structure deviates from a surface of a lens surface of a digital twin of a spectacle lens comprising said one ring-shaped structure, along the respective direction of the variable width of said ring-shaped structure.
A variable width of one ring-shaped structure may alternatively comprise that in each tangential direction or in different tangential directions an expansion of said one ring-shaped structure limited by an inner onset and an outer onset is of a different width. A tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of a spectacle lens radially outwards.
“One ring-shaped structure having a variable width on a spectacle lens” results from transferring a digital twin of a spectacle lens comprising one ring-shaped structure having a variable width in physical reality, by manufacturing said spectacle lens. The definition given before with respect to one ring-shaped structure of a spectacle lens shall apply accordingly. A “variable width of one ring-shaped structure” designates a variable expansion of said one ring-shaped structure along different directions perpendicular to a circumferential direction as determined between onsets, i.e., an inner and an outer onset, of said one ring-shaped structure. An ” onset of one ring-shaped structure” represents an inner onset, i.e., a first position and an outer onset, i.e., a last position in which a surface of said one ring-shaped structure deviates from a surface–surface preferably in the sense of surface shape, form or topography-of a lens surface of a spectacle lens comprising said one ring-shaped structure, along the respective direction of the variable width of said ring-shaped structure.
A variable width of one ring-shaped structure may alternatively comprise that in each tangential direction or in different tangential directions an expansion of said one ring-shaped structure limited by an inner onset and an outer onset is of a different width. A tangential direction shall be any direction from an optical centre or a fitting point of a spectacle lens radially outwards.
“More ring-shaped structures each having a variable width on a digital twin of a spectacle lens shall comprise the definition provided before with respect to more ring-shaped structures of a digital twin of a spectacle lens. A “variable width of more ring-shaped structures” designates a variable expansion of  each of said more ring-shaped structures along a perpendicular direction to their respective circumferential direction as determined between respective onsets, i.e., arespective inner onset and a respective outer onset, of each ring-shaped structure of said more ring-shaped structures. A “respective onset of each of said more ring-shaped structures” represents each inner onset of each ring-shaped structure of said more ring-shaped structures, i.e., each first position and each outer onset of each ring-shaped structure of said more ring-shaped structures, i.e., each last position in which a surface of said one ring-shaped structure deviates from a surface, surface preferably in the sense of surface shape, form or topography, of a lens surface of a digital twin of a spectacle lens, each comprising said more ring-shaped structure, along the direction of the respective variable widths of each ring-shaped structure of said more ring-shaped structures. A variable width of each ring-shaped structure of said more ring-shaped structures may alternatively comprise that in each tangential direction or in different tangential directions an expansion of each ring-shaped structure of said more ring-shaped structures limited by a respective inner onset and a respective outer onset is of a different width. A tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of the spectacle lens radially outwards.
“More ring-shaped structures each having a variable width on a spectacle lens” result from transferring a digital twin of a spectacle lens comprising said more ring-shaped structures each having a variable width in physical reality, by manufacturing said spectacle lens. The definition provided before with respect to more ring-shaped structures of a spectacle lens shall apply accordingly. A “variable width of more ring-shaped structures” designates a variable expansion of each ring-shaped structure of said more ring-shaped structures along a perpendicular direction to their respective circumferential direction as determined between respective onsets, i.e., a respective inner onset and a respective outer onset, of each ring-shaped structure of said more ring-shaped structures. A “respective onset of each of said more ring-shaped structures” represents each inner onset of each ring-shaped structure of said more ring-shaped structures, i.e., each first position, and each outer onset of each ring-shaped structure of said more ring-shaped structures, i.e., each last position in which a surface of each ring-shaped structure deviates from a surface, preferably in the sense of surface shape, form or topography, of a lens surface of a spectacle lens, each comprising said more ring-shaped structure, along the direction of the respective variable widths of each ring-shaped structure of said more ring-shaped structures. A variable width of each of said more ring-shaped structures may alternatively comprise that in each tangential direction or in different tangential directions an expansion of each ring-shaped structure of said more ring-shaped structure limited by a respective inner onset and a respective outer onset is of a different width. A tangential direction shall be any direction from an optical centre or a fitting point of the spectacle lens radially outwards.
“One ring-shaped diffusing structure having a variable width on a digital twin of a spectacle lens” shall comprise the definition provided before for one ring-shaped diffusing structure. A “variable width of one ring-shaped diffusing structure” designates a variable expansion of said one ring-shaped diffusing structure along different directions perpendicular to a circumferential direction as determined between onsets, i.e., an inner and an outer onset, of said one ring-shaped diffusing structure. An ” onset of one  ring-shaped diffusing structure” represents an inner onset, i.e., a first position and an outer onset, i.e., a last position in which said one ring-shaped diffusing structure changes a calculated transmission of a digital twin of a spectacle lens along the respective direction of the variable width of said one ring-shaped diffusing structure.
A variable width of one ring-shaped diffusing structure may alternatively comprise that in each tangential direction or in different tangential directions an expansion of said one ring-shaped diffusing structure limited by an inner onset and an outer onset is of a different width. A tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of a spectacle lens radially outwards.
“One ring-shaped diffusing structure having a variable width on a spectacle lens” results from transferring a digital twin of a spectacle lens comprising one ring-shaped diffusing structure having a variable width in physical reality, by manufacturing said spectacle lens. The definition given before with respect to one ring-shaped diffusing structure of a spectacle lens shall apply accordingly. A “variable width of one ring-shaped diffusing structure” designates a variable expansion of said one ring-shaped diffusing structure along different directions perpendicular to a circumferential direction as determined between onsets, i.e., an inner and an outer onset, of said one ring-shaped diffusing structure. An ” onset of one ring-shaped diffusing structure” represents an inner onset, i.e., a first position and an outer onset, i.e., a last position in which said one ring-shaped diffusing structure changes a transmission of a spectacle lens along the respective direction of the variable width of said ring-shaped diffusing structure.
A variable width of one ring-shaped diffusing structure may alternatively comprise that in each tangential direction or in different tangential directions an expansion of said one ring-shaped diffusing structure limited by an inner onset and an outer onset is of a different width. A tangential direction shall be any direction from an optical centre or a fitting point of a spectacle lens radially outwards.
“More ring-shaped diffusing structures each having a variable width on a digital twin of a spectacle lens” shall comprise the definition provided before with respect to more ring-shaped diffusing structures of a digital twin of a spectacle lens. A “variable width of more ring-shaped diffusing structures” designates a variable expansion of each of said more ring-shaped diffusing structures along a perpendicular direction to their respective circumferential direction as determined between respective onsets, i.e., a respective inner onset and a respective outer onset, of each ring-shaped diffusing structure of said more ring-shaped diffusing structures. A “respective onset of each ring-shaped diffusing structure of said more ring-shaped diffusing structures” represents each inner onset of each ring-shaped diffusing structure of said more ring-shaped diffusing structures, i.e., each first position and each outer onset of each ring-shaped diffusing structure of said more ring-shaped diffusing structures, i.e., each last position in which said one ring-shaped diffusing structure changes a calculated transmission of a digital twin of a spectacle lens along the respective direction of the variable width of each ring-shaped diffusing structure of said more ring-shaped diffusing structures. A variable width of each ring-shaped diffusing structure of said more ring-shaped diffusing structures may alternatively comprise that in each tangential direction or in different tangential directions an  expansion of each ring-shaped diffusing structure of said more ring-shaped diffusing structures limited by a respective inner onset and a respective outer onset is of a different width. A tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of the spectacle lens radially outwards.
“More ring-shaped diffusing structures each having a variable width on a spectacle lens” result from transferring a digital twin of a spectacle lens comprising said more ring-shaped diffusing structures each having a variable width in physical reality, by manufacturing said spectacle lens. The definition provided before with respect to more ring-shaped diffusing structures of a spectacle lens shall apply accordingly. A “variable width of more ring-shaped diffusing structures” designates a variable expansion of each ring-shaped diffusing structure of said more ring-shaped diffusing structures along a perpendicular direction to their respective circumferential direction as determined between respective onsets, i.e., a respective inner onset and a respective outer onset, of each ring-shaped diffusing structure of said more ring-shaped structures. A “respective onset of each of said more ring-shaped diffusing structures” represents each inner onset of each ring-shaped diffusing structure of said more ring-shaped diffusing structures, i.e., each first position, and each outer onset of each ring-shaped diffusing structure of said more ring-shaped diffusing structures, i.e., each last position in which said each ring-shaped diffusing structure changes a transmission of a spectacle lens along the respective direction of the variable width of each ring-shaped diffusing structure of said more ring-shaped structures. A variable width of each ring-shaped diffusing structure of said more ring-shaped structures may alternatively comprise that in each tangential direction or in different tangential directions an expansion of each ring-shaped diffusing structure of said more ring-shaped diffusing structure limited by a respective inner onset and a respective outer onset is of a different width. A tangential direction shall be any direction from an optical centre or a fitting point of the spectacle lens radially outwards.
The above-described problem is fully solved by a digital twin of a spectacle lens described in the forgoing. Since the intended wearers of a respective spectacle lens are children, a higher level of comfort and wearability prevent the children from removing the spectacle lens.
In a preferred embodiment of the invention, the digital twin of the spectacle lens configured for the purpose of manufacturing the spectacle lens is characterized in that a central zone comprises an optical centre defined analogously as in ISO 13666: 2019 (E) , section 3.2.15, or a fitting point defined analogously as in ISO 13666: 2019 (E) , section 3.2.34, of said digital twin.
In a preferred embodiment of the invention, the digital twin of the spectacle lens configured for the purpose of manufacturing the spectacle lens is characterized in that a uniform width of at least one of the group consisting of one ring-shaped structure, more ring-shaped structures, preferably each ring-shaped structure of said more ring-shaped structures, one ring-shaped diffusing structure and more ring-shaped diffusing structures, preferably each ring-shaped diffusing structure of said more ring-shaped diffusing structures is within at least one range of the following group of ranges:
(i) said uniform width is larger than 0.2 mm and equal or lower than 0.7 mm;
(ii) said uniform width is larger than 0.3 mm and equal or lower than 0.7 mm;
(iii) said uniform width is equal or lower than 0.6 mm;
(iv) said uniform width is larger than 0.2 mm and equal or lower than 0.6 mm;
(v) said uniform width is larger than 0.3 mm and equal or lower than 0.6 mm;
(vi) said uniform width is equal or lower than 0.5 mm;
(vii) said uniform width is larger than 0.2 mm and equal or lower than 0.5 mm;
(viii) said uniform width is larger than 0.3 mm and equal or lower than 0.5 mm.
A uniform width within any one of the before mentioned ranges has the beneficial effect to define a well-defined balance between wearability and manufacturing of a respective spectacle lens. A decrease of the uniform width leads to a more comfortable wearability whereas an increase of the uniform width enables easier manufacturing of the respective spectacle lens.
In a preferred embodiment of the invention, the digital twin of the spectacle lens configured for the purpose of manufacturing the spectacle lens is characterized in that a central zone width is within at least one range of the following group of ranges:
(i) said central zone width (cw110, cw210, cw310, …) is larger than 6 mm and lower than or equal to 7 mm;
(ii) said central zone width (cw110, cw210, cw310, …) is larger than 7 mm and lower than or equal to 9.4 mm.
Reference is made to the before given explanation for said selection.
In a preferred embodiment of the invention, the digital twin of the spectacle lens configured for the purpose of manufacturing the spectacle lens is characterized in that one ring-shaped structure or each of said more ring-shaped structures provide (s) a surface power to said digital twin which is different to a surface power of a lens surface comprising said one or more ring-shaped structure (s) outside a domain occupied by said ring-shaped structure (s) , within at least one range of the following group of ranges:
A) a difference in surface power being within a range of larger than 6 dioptres and equal or lower than 12 dioptres;
B) a difference in surface power being within a range of larger than 7 dioptres and equal or lower than 11 dioptres;
C) a difference in surface power being within a range of larger than 8 dioptres and equal or lower than 10 dioptres.
A difference in surface power as in the selected ranges given before has the beneficial effect to further define a balance between wearability and manufacturing of a respective spectacle lens. A difference in surface power between 10 dioptres and 12 dioptres preferably increases the probable efficacy of the respective spectacle lens for a reduction of progression of myopia for a wearer. A difference in surface power between 6 dioptres and 8 dioptres preferably increases a comfortable wearability of a respective spectacle lens. In other words, a well-defined balance between wearability and  manufacturing of the respective spectacle lens is achieved with a difference in surface power in the range of 6 dioptres to 12 dioptres.
In a preferred embodiment of the invention, the digital twin of the spectacle lens configured for the purpose of manufacturing the spectacle lens is characterized in that a variable width of at least one of the group consisting of one ring-shaped structure, more ring-shaped structures, preferably each ring-shaped structure of said more ring-shaped structures, one ring-shaped diffusing structure and more ring-shaped diffusing structures, preferably each ring-shaped diffusing structure of said more ring-shaped diffusing structures varies within at least one range of the following group of ranges:
(i) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.7 mm;
(ii) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.7 mm;
(iii) said variable width varies in a range of lower than 0.6 mm;
(iv) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.6 mm;
(v) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.6 mm;
(vi) said variable width varies in a range of lower than 0.5 mm;
(vii) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.5 mm;
(viii) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.5 mm.
A variable width within any one of the before mentioned ranges has the beneficial effect to define a well-defined balance between wearability and manufacturing of a respective spectacle lens in each ring-shaped structure having a variable width or in each ring-shaped diffusing structure having a variable width. A decrease of the variable width within each ring-shaped structure or within each ring-shaped diffusing structure leads to a more comfortable wearability whereas an increase of the variable width within each ring-shaped structure or within each ring-shaped diffusing structure enables easier manufacturing of the respective spectacle lens.
In a preferred embodiment of the invention, the digital twin of the spectacle lens configured for the purpose of manufacturing the spectacle lens is characterized in that one ring-shaped structure having a variable surface power or each ring-shaped structure of more ring-shaped structures having a variable surface power provide a variable surface power to said digital twin which is different to a surface power of a lens surface comprising said one or more ring-shaped structure (s) having said variable surface power outside a domain occupied by said one or more ring-shaped structure (s) having said variable surface power, varying within at least one range of the following group of ranges:
A) a difference in surface power varying within a range of larger than 6 dioptres and equal or lower than 12 dioptres;
B) a difference in surface power varying within a range of larger than 7 dioptres and equal or lower than 11 dioptres;
C) a difference in surface power varying within a range of larger than 8 dioptres and equal or lower than 10 dioptres.
A difference in surface power varying within one ring-shaped structure having a variable surface power or within each ring-shaped structure of more ring-shaped structures having a variable surface power as in the selected ranges given before has the beneficial effect to further define a balance  between wearability and manufacturing of a respective spectacle lens. A difference in surface power varying between 10 dioptres and 12 dioptres within one ring-shaped structure having a variable surface power or within each ring-shaped structure of more ring-shaped structures having a variable surface power preferably increases the probable efficacy of the respective spectacle lens for a reduction of progression of myopia for a wearer. A difference in surface power between 6 dioptres and 8 dioptres within one ring-shaped structure having a variable surface power or within each ring-shaped structure of more ring-shaped structures having a variable surface power preferably increases a comfortable wearability of a respective spectacle lens. In other words, a well-defined balance between wearability and manufacturing of the respective spectacle lens is achieved with a difference in surface power varying in the range of 6 dioptres to 12 dioptres within one ring-shaped structure having a variable surface power or within each ring-shaped structure of more ring-shaped structures having a variable surface power.
The computer-implemented method according to the invention configured for calculating a digital twin of a spectacle lens (100 to 300) for the purpose of a use of said digital twin for manufacturing the spectacle lens, said digital twin comprising one ring-shaped structure or more ring-shaped structures (101, 102, 103, …) or one ring-shaped diffusing structure or more ring-shaped diffusing structures (301, 302, 303, …) each having a respective uniform width (w101, w102, w103, …; w301, w302, w303, …) , comprises the steps of
- determining a central zone (110, 210, 310, …) on a lens surface of said digital twin such as to comprise a central zone width (cw110, cw210, cw310, …) within a range of 6 mm to 9.4 mm;
- arranging said one ring-shaped structure or said more ring-shaped structures (101, 102, 103, …) such that said one ring-shaped structure or an innermost of said more ring-shaped structures is positioned adjacent and along said central zone or arranging said one ring-shaped diffusing structure or said more ring-shaped diffusing structures (301, 302, 303, …) such that said one ring-shaped diffusing structure or an innermost of said more ring-shaped diffusing structures is positioned adjacent and along said central zone;
- in case of more ring-shaped structure or in case of more ring-shaped diffusing structures determining a surface-based fill factor (sf101, sf201) defined as a surface area ratio of a surface area of an innermost of said more ring-shaped structures (101, 102, 103, …) or of an innermost of said more ring-shaped diffusing structures (301, 302, 303, …) and a sum of said surface area of said innermost ring-shaped structure of said more ring-shaped structures (101, 102, 103, …) or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures (301, 302, 303, …) and a surface area of a peripheral zone (110, 210, 310, …) , such that said surface-based fill factor is
○ larger than 17 %and equal or lower than 70%for said uniform width (w101, w102, w103, …; w301, w302, w303, …) of said more ring-shaped structures (101, 102, 103, …) or said more ring-shaped diffusing structures (301, 302, 303, …) in a range of 0.6 mm to 0.7 mm, or
○ larger than 15 %and equal or lower than 60 %for said uniform width (w101, w102, w103, …; w301, w302, w303, …) of said more ring-shaped structures (101, 102, 103, …) or said more ring-shaped diffusing structures (301, 302, 303, …) in a range of 0.5 mm to 0.6 mm, or
○ larger than 6 %and equal or lower than 50 %for said uniform width (w101, w102, w103, …; w301, w302, w303, …) of said more ring-shaped structures (101, 102, 103, …) or said more ring-shaped diffusing structures (301, 302, 303, …) lower than 0.5 mm;
and is characterized in the step of
a) replacing at least one of
- said one ring-shaped structure or of said one ring-shaped diffusing structure,
- each of said more ring-shaped structures or each of said more ring-shaped diffusing structures,
- at least one of said more ring-shaped structures or at least one of said more ring-shaped diffusing structures
by
- one ring-shaped diffractive structure or more ring-shaped diffractive structures,
- one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power,
- one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
- one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width,
or adding at least one of
- one ring-shaped diffractive structure or more ring-shaped diffractive structures,
- one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power,
- one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
- one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width,
to
- said one ring-shaped structure or said one ring-shaped diffusing structure,
- said more ring-shaped structures or said more ring-shaped diffusing structures.
With respect to definitions and further explanations reference is made to the before with respect to a digital of a spectacle lens provided ones.
The above-described problem is fully solved by a computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens described in the forgoing. Since the computer-implemented method for calculating said digital twin is addressing children as main intended wearers of a respective spectacle lens, a higher level of comfort and wearability is desirable to prevent the children from removing the spectacle lens.
In a preferred embodiment of the invention, the computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens comprises the step of
- determining a central zone such as to comprise an optical centre defined analogously as in ISO 13666: 2019 (E) , section 3.2.15, or a fitting point defined analogously as in ISO 13666: 2019 (E) , section 3.2.34, of said digital twin.
In a preferred embodiment of the invention, the computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens comprises the step of
- determining a uniform width of at least one of the group consisting of one ring-shaped structure, more ring-shaped structures, preferably each ring-shaped structure of said more ring-shaped structures, one ring-shaped diffusing structure and more ring-shaped diffusing structures, preferably each ring-shaped diffusing structure of said more ring-shaped diffusing structures such as to be set within at least one range of the following group of ranges:
(i) said uniform width is larger than 0.2 mm and equal or lower than 0.7 mm;
(ii) said uniform width is larger than 0.3 mm and equal or lower than 0.7 mm;
(iii) said uniform width is equal or lower than 0.6 mm;
(iv) said uniform width is larger than 0.2 mm and equal or lower than 0.6 mm;
(v) said uniform width is larger than 0.3 mm and equal or lower than 0.6 mm;
(vi) said uniform width is equal or lower than 0.5 mm;
(vii) said uniform width is larger than 0.2 mm and equal or lower than 0.5 mm;
(viii) said uniform width is larger than 0.3 mm and equal or lower than 0.5 mm.
The before mentioned and with respect to the digital twin of a spectacle lens provided definitions and explanations shall apply accordingly.
In a preferred embodiment of the invention, the computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens comprises the step of
- determining a central zone width such as to be set within at least one range of the following group of ranges:
(i) said central zone width (cw110, cw210, cw310, …) is larger than 6 mm and lower than or equal to 7 mm;
(ii) said central zone width (cw110, cw210, cw310, …) is larger than 7 mm and lower than or equal to 9.4 mm.
The before mentioned and with respect to the digital twin of a spectacle lens provided definitions and explanations shall apply accordingly.
In a preferred embodiment of the invention, the computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens comprises the step of
- determining a surface of said one ring-shaped structure or determining each surface of said more ring-shaped structures such that each provide a surface power to said digital twin which is different to a surface power of a lens surface comprising said one or more ring-shaped structure (s) outside a domain occupied by said ring-shaped structure (s) within at least one range of the following group of ranges:
A) a difference in surface power being within a range of larger than 6 dioptres and equal or lower than 12 dioptres;
B) a difference in surface power being within a range of larger than 7 dioptres and equal or lower than 11 dioptres;
C) a difference in surface power being within a range of larger than 8 dioptres and equal or lower than 10 dioptres.
The before mentioned and with respect to the digital twin of a spectacle lens provided definitions and explanations shall apply accordingly.
In a preferred embodiment of the invention, the computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens comprises the step of
- determining said variable width of at least one of the group consisting of said one ring-shaped structure having a variable width, said more ring-shaped structures each having a variable width, said one ring-shaped diffusing structure having a variable width, and said more ring-shaped diffusing structures each having a variable width such as to vary within at least one range of the following group of ranges:
(i) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.7 mm;
(ii) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.7 mm;
(iii) said variable width varies in a range of lower than 0.6 mm;
(iv) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.6 mm;
(v) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.6 mm;
(vi) said variable width varies in a range of lower than 0.5 mm;
(vii) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.5 mm;
(viii) said variable width varied in a range of larger than 0.3 mm and equal or lower than 0.5 mm.
The before mentioned and with respect to the digital twin of a spectacle lens provided definitions and explanations shall apply accordingly.
In a preferred embodiment of the invention, the computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens comprises the step of
- determining a variable surface power for said one ring-shaped structure having a variable surface power or for each of said more ring-shaped structures having a variable surface power such that the variable surface power is different to a surface power of a lens surface comprising said one or more ring-shaped structure (s) having said variable surface power outside a domain occupied by said one or more ring-shaped structure (s) having said variable surface power, varying within at least one range of the following group of ranges:
A) a difference in surface power varying within a range of larger than 6 dioptres and equal or lower than 12 dioptres;
B) a difference in surface power varying within a range of larger than 7 dioptres and equal or lower than 11 dioptres;
C) a difference in surface power varying within a range of larger than 8 dioptres and equal or lower than 10 dioptres.
The before mentioned and with respect to the digital twin of a spectacle lens provided definitions and explanations shall apply accordingly.
In a preferred embodiment of the invention, acomputer comprising a processor is configured to perform the before described computer-implemented method.
In a preferred embodiment of the invention, a data processing system comprises a processor and a storage medium coupled to the processor, wherein the processor is adapted to perform the before described computer-implemented method based on a computer program stored on the storage medium. Said computer program may be stored on a non-transitory tangible computer-readable storage medium, the computer program comprising instructions which, when the program is executed by a computer, cause the computer to carry out the computer-implemented method described before.
In a preferred embodiment of the invention, acomputer program comprises instructions which, when the program is executed by a computer, cause the computer to carry out the before described computer-implemented method.
Said computer program may be stored on a non-transitory tangible computer-readable storage medium, the computer program comprising instructions which, when the program is executed by a computer, cause the computer to carry out the above-described computer-implemented method.
In a preferred embodiment of the invention, a computer-readable medium having stored thereon said computer program. Said computer-readable storage medium may be a non-transitory tangible computer-readable storage medium.
In a preferred embodiment of the invention, a computer-readable medium comprises instructions which, when executed by a computer, cause the computer to carry out the before described computer-implemented method. Said computer-readable storage medium may be a non-transitory tangible computer-readable storage medium.
In a preferred embodiment of the invention, acomputer-readable data carrier having stored thereon the before mentioned computer program.
In a preferred embodiment of the invention, adata carrier signal is carrying the before mentioned computer program.
A spectacle lens according to the invention comprises
- one ring-shaped structure or more ring-shaped structures or
- one ring-shaped diffusing structure or more ring-shaped diffusing structures
each having a respective uniform width, and at least one first additional feature of the following group of first features:
(i) a central zone having a central zone width within a range of 6 mm to 9.4 mm and said uniform width being equal to or lower than 0.7 mm;
(ii) said uniform width being lower than 0.5 mm;
(iii) a surface-based fill factor defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said more ring-shaped structures or of an innermost ring-shaped diffusing  structure of said more ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped structure of said more ring-shaped structures or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a surface area of a peripheral zone, said surface-based fill factor being larger than 17 %and equal or lower than 70%for said uniform width of said more ring-shaped structures or said more ring-shaped diffusing structures in a range of 0.6 mm to 0.7 mm;
(iv) a surface-based fill factor defined as a surface area ratio of a surface area an innermost ring-shaped structure of said more ring-shaped structures or of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped structure of said more ring-shaped structures or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a surface area of a peripheral zone, said surface-based fill factor being larger than 15 %and equal or lower than 60 %for said uniform width of said more ring-shaped structures or said more ring-shaped diffusing structures in a range of 0.5 mm to 0.6 mm;
(v) a surface-based fill factor defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said more ring-shaped structures or of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a sum of said surface area of said an innermost ring-shaped structure of said more ring-shaped structures or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures and a surface area of a peripheral zone, said surface-based fill factor being larger than 6 %and equal or lower than 50 %for said uniform width of said more ring-shaped structures or said more ring-shaped diffusing structures lower than 0.5 mm,
said spectacle lens being characterized in comprising at least one second additional feature of the following group of second features:
- one ring-shaped diffractive structure or more ring-shaped diffractive structures,
- one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power,
- one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
- one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width,
each of said second features
a) instead of said one ring-shaped structure, instead of said more ring-shaped structures or instead of at least one of said more ring-shaped structures, or
b) instead of said one ring-shaped diffusing structure, instead of said more ring-shaped diffusing structures or instead of a least one of said more ring-shaped diffusing structures, or
c) additionally to said one ring-shaped structure or additionally to said more ring-shaped structures, or
d) additionally to said one ring-shaped diffusing structure or additionally to said more ring-shaped diffusing structures.
The before given definitions and explanations shall apply accordingly with respect to said spectacle lens.
The above-described problem is fully solved by a spectacle lens described in the forgoing. Since the intended wearers of said spectacle lens are children, a higher level of comfort and wearability prevent the children from removing the spectacle lens.
In a preferred embodiment of the invention, the spectacle lens is characterized in that a central zone comprises an optical centre as defined in ISO 13666: 2019 (E) , section 3.2.15, or a fitting point as defined in ISO 13666: 2019 (E) , section 3.2.34, of said spectacle lens.
In a preferred embodiment of the invention, the spectacle lens is characterized in that a uniform width of at least one of the group selected from one ring-shaped structure, more ring-shaped structures, preferably each ring-shaped structure of said more ring-shaped structures, one ring-shaped diffusing structure and more ring-shaped diffusing structures, preferably each ring-shaped diffusing structure of said more ring-shaped diffusing structures is within at least one range of the following group of ranges:
(i) said uniform width is larger than 0.2 mm and equal or lower than 0.7 mm;
(ii) said uniform width is larger than 0.3 mm and equal or lower than 0.7 mm;
(iii) said uniform width is equal or lower than 0.6 mm;
(iv) said uniform width is larger than 0.2 mm and equal or lower than 0.6 mm;
(v) said uniform width is larger than 0.3 mm and equal or lower than 0.6 mm;
(vi) said uniform width is equal or lower than 0.5 mm;
(vii) said uniform width is larger than 0.2 mm and equal or lower than 0.5 mm;
(viii) said uniform width is larger than 0.3 mm and equal or lower than 0.5 mm.
The before given definitions and explanation shall apply accordingly.
In a preferred embodiment of the invention, the spectacle lens is characterized in that a central zone width is within at least one range of the following group of ranges:
(i) said central zone width (cw110, cw210, cw310, …) is larger than 6 mm and lower than or equal to 7 mm;
(ii) said central zone width (cw110, cw210, cw310, …) is larger than 7 mm and lower than or equal to 9.4 mm.
The before given definitions and explanations shall apply accordingly.
In a preferred embodiment of the invention, the spectacle lens is characterized in that one ring-shaped structure or each ring-shaped structure of more ring-shaped structures provide (s) asurface power to said spectacle lens which is different to a surface power of a lens surface comprising said one or more ring-shaped structure (s) outside a domain occupied by said ring-shaped structure (s) , within at least one range of the following group of ranges:
A) a difference in surface power being within a range of larger than 6 dioptres and equal or lower than 12 dioptres;
B) a difference in surface power being within a range of larger than 7 dioptres and equal or lower than 11 dioptres;
C) a difference in surface power being within a range of larger than 8 dioptres and equal or lower than 10 dioptres.
The before given definitions and explanations shall apply accordingly.
In a preferred embodiment of the invention, the spectacle lens is characterized in that a variable width of at least one of the group consisting of one ring-shaped structure having a variable width, each ring-shaped structure of more ring-shaped structures having a variable width, one ring-shaped diffusing structure having a variable width and each ring-shaped diffusing structure of more ring-shaped diffusing structures having a variable width, varies within at least one range of the following group of ranges:
(i) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.7 mm;
(ii) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.7 mm;
(iii) said variable width varies in a range of lower than 0.6 mm;
(iv) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.6 mm;
(v) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.6 mm;
(vi) said variable width varies in a range of lower than 0.5 mm;
(vii) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.5 mm;
(viii) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.5 mm.
The before given definitions and explanations shall apply accordingly.
In a preferred embodiment of the invention, the spectacle lens is characterized in that one ring-shaped structure having a variable surface power or each ring-shaped structure of more ring-shaped structures having a variable surface power provide a variable surface power to said spectacle lens which is different to a surface power of a lens surface comprising said one or more ring-shaped structure (s) having said variable surface power outside a domain occupied by said one or more ring-shaped structure (s) having said variable surface power, varying within at least one range of the following group of ranges:
A) a difference in surface power varying within a range of larger than 6 dioptres and equal or lower than 12 dioptres;
B) a difference in surface power varying within a range of larger than 7 dioptres and equal or lower than 11 dioptres;
C) a difference in surface power varying within a range of larger than 8 dioptres and equal or lower than 10 dioptres.
The before given definitions and explanations shall apply accordingly.
The invention will be disclosed exemplarily in the following with reference to the figures:
Fig. 1 shows a digital twin of single vision spectacle lens 100 with five ring-shaped structures 101 to 105.
Fig. 2 shows a cross-sectional view of the digital twin of the single vision spectacle lens 100 of figure 1 having a front surface 131 and a back surface 133. Auniform width w101 to w103 of a ring-shaped structure is limited by an inner onset, io101, io102, io103, and a respective outer onset, oo101, oo102,  oo103. A central zone width cw110 is shown. For simplicity reasons only the three ring-shaped structures 101 to 103 are shown in figure 2 compared to the five ring-shaped structures 101 to 105 shown in figure 1.
Fig. 3 shows a digital twin of a coated single vision spectacle lens 200 with five coated ring-shaped structures 201 to 205.210 is a coated central zone.
Fig. 4 shows a cross-sectional view of the digital twin of the coated single vision spectacle lens 200 of figure 3 having a coated front surface 231 and a coated back surface 233, coated with a coating 237. A uniform width w201 to w203 of a coated ring-shaped structure is limited by an inner onset, io201, io202, io203, and a respective outer onset, oo201, oo202, oo203. A central zone width cw210 is shown. For simplicity reasons only the three ring-shaped structures 201 to 203 are shown in figure 4 compared to the five ring-shaped structures 201 to 205 shown in figure 3.
Fig. 5 shows a digital twin of a single vision spectacle lens 300 with five ring-shaped diffusing structures 301 to 305.
Fig. 6 shows a cross-sectional view of digital twin of the single vision spectacle lens 300 of figure 5 having a front surface 331 and a back surface 333. A uniform width w301 to w303 of a ring-shaped structure is limited by an inner onset, io301, io302, io303, and a respective outer onset, oo301, oo302, oo303. A central zone width cw310 is shown. For simplicity reasons only the three ring-shaped diffusing structures 301 to 303 are shown in figure 6 compared to the five ring-shaped diffusing structures 301 to 305 shown in figure 5.
In each of figures 1 to 6 a replacement by or an addition of at least one second additional feature according to claim 1 may have taken place.
The invention will be further exemplarily demonstrated in the following with reference to a study:
Table 1 below shows different calculated design characteristics of a digital twin of a spectacle lens, in the order of satisfaction of wearability of a respective spectacle lens evaluated by a wearer. The subjects of a study evaluated said calculated design characteristics of said digital twin in a range from 1 to 10, wherein 10 equals to best possible wearability of respective a spectacle lens and 1 equals to the worst possible wearability of a respective spectacle lens. A satisfaction of wearability greater or equal to 4.0 is considered as sufficient, hence children would probably accept such spectacle lenses with said satisfaction of wearability and would probably not to tend to dismiss the respective spectacle lens.
The lenses 1 to 9 in table 1 are therefore examples of a digital twin of a spectacle lens and a respective spectacle lens whereas spectacle lenses 10 to 16 are considered as reference spectacle lenses for the spectacle lenses 1 to 9 in reference to the satisfaction of wearability.
Table 1: Design characteristics of digital twins of spectacle lenses and respective spectacle lenses with the specific characterizations and wearer satisfaction and visual acuity when looking through the periphery of the lens.

Claims (26)

  1. Digital twin of a spectacle lens (100 to 300) configured for the purpose of a use of the digital twin for manufacturing the spectacle lens, said digital twin (100 to 300) comprising
    - one ring-shaped structure or more ring-shaped structures (101, 102, 103, …) or
    - one ring-shaped diffusing structure or more ring-shaped diffusing structures (301, 302, 303, …) each having a respective uniform width (w101, w102, w103, …; w301, w302, w303, …) , said digital twin comprising at least one first additional feature of the following group of first features:
    (i) a central zone (110, 210, 310, …) having a central zone width (cw110, cw210, cw310, …) within a range of 6 mm to 9.4 mm and said uniform width (w101, w102, w103, …; w301, w302, w303, …) being equal to or lower than 0.7 mm;
    (ii) said uniform width (w101, w102, w103, …; w301, w302, w303, …) being lower than 0.5 mm;
    (iii) a surface-based fill factor (sf101, sf201) defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said more ring-shaped structures (101, 102, 103, …) or of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures (301, 302, 303, …) and a sum of said surface area of said innermost ring-shaped structure of said more ring-shaped structures (101, 102, 103, …) or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures (301, 302, 303, …) and a surface area of a peripheral zone (110, 210, 310, …) , said surface-based fill factor (sf101, sf201) being larger than 17 %and equal or lower than 70%for said uniform width (w101, w102, w103, …; w301, w302, w303, …) of said more ring-shaped structures (101, 102, 103, …) or said more ring-shaped diffusing structures (301, 302, 303, …) in a range of 0.6 mm to 0.7 mm;
    (iv) a surface-based fill factor (sf101, sf201) defined as a surface area ratio of a surface area an innermost ring-shaped structure of said more ring-shaped structures (101, 102, 103, …) or of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures (301, 302, 303, …) and a sum of said surface area of said innermost ring-shaped structure of said more ring-shaped structures (101, 102, 103, …) or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures (301, 302, 303, …) and a surface area of a peripheral zone (110, 210, 310, …) , said surface-based fill factor (sf101, sf201) being larger than 15 %and equal or lower than 60 %for said uniform width (w101, w102, w103, …; w301, w302, w303, …) of said more ring-shaped structures (101, 102, 103, …) or said more ring-shaped diffusing structures (301, 302, 303, …) in a range of 0.5 mm to 0.6 mm;
    (v) a surface-based fill factor (sf101, sf201) defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said more ring-shaped structures (101, 102, 103, …) or of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures (301, 302, 303, …) and a sum of said surface area of said an innermost ring-shaped structure of said more ring-shaped structures (101, 102, 103, …) or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures (301, 302, 303, …) and a surface area of a peripheral zone (110, 210, 310, …) , said surface-based fill factor (sf101, sf201) being larger than 6 %and equal or lower than 50 %for said uniform width (w101, w102, w103, …; w301, w302, w303, …) of said more ring-shaped structures (101, 102, 103, …) or said more ring-shaped diffusing structures (301, 302, 303, …) lower than 0.5 mm,  said digital twin being characterized in comprising at least one second additional feature of the following group of second features:
    - one ring-shaped diffractive structure or more ring-shaped diffractive structures,
    - one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power,
    - one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
    - one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width,
    each of said second features
    a) instead of said one ring-shaped structure, instead of said more ring-shaped structures or instead of at least one of said more ring-shaped structures, or
    b) instead of said one ring-shaped diffusing structure, instead of said more ring-shaped diffusing structures or instead of a least one of said more ring-shaped diffusing structures, or
    c) additionally to said one ring-shaped structure or additionally to said more ring-shaped structures, or
    d) additionally to said one ring-shaped diffusing structure or additionally to said more ring-shaped diffusing structures.
  2. Digital twin according to claim 1, characterized in that said central zone comprises an optical centre defined analogously as in ISO 13666: 2019 (E) , section 3.2.15, or a fitting point defined analogously as in ISO 13666: 2019 (E) , section 3.2.34, of said digital twin.
  3. Digital twin according to any one of the preceding claims, characterized in that said uniform width (w101, w102, w103, …; w201, w202, w103, …) is within at least one range of the following group of ranges:
    (i) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is larger than 0.2 mm and equal or lower than 0.7 mm;
    (ii) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is larger than 0.3 mm and equal or lower than 0.7 mm;
    (iii) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is equal or lower than 0.6 mm;
    (iv) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is larger than 0.2 mm and equal or lower than 0.6 mm;
    (v) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is larger than 0.3 mm and equal or lower than 0.6 mm;
    (vi) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is equal or lower than 0.5 mm;
    (vii) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is larger than 0.2 mm and equal or lower than 0.5 mm;
    (viii) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is larger than 0.3 mm and equal or lower than 0.5 mm.
  4. Digital twin according to any one of the preceding claims, characterized in that said central zone width (cw110, cw210, cw310, …) is within at least one range of the following group of ranges:
    (i) said central zone width (cw110, cw210, cw310, …) is larger than 6 mm and lower than or equal to 7 mm;
    (ii) said central zone width (cw110, cw210, cw310, …) is larger than 7 mm and lower than or equal to 9.4 mm.
  5. Digital twin according to any one of the preceding claims, characterized in that said one ring-shaped structure or each of said more ring-shaped structures provide (s) asurface power to said digital twin which is different to a surface power of a lens surface comprising said one or more ring-shaped structure (s) outside a domain occupied by said ring-shaped structure (s) , within at least one range of the following group of ranges:
    A) a difference in surface power being within a range of larger than 6 dioptres and equal or lower than 12 dioptres;
    B) a difference in surface power being within a range of larger than 7 dioptres and equal or lower than 11 dioptres;
    C) a difference in surface power being within a range of larger than 8 dioptres and equal or lower than 10 dioptres.
  6. Digital twin according to any one of the preceding claims, characterized in that said variable width varies within at least one range of the following group of ranges:
    (i) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.7 mm;
    (ii) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.7 mm;
    (iii) said variable width varies in a range of lower than 0.6 mm;
    (iv) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.6 mm;
    (v) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.6 mm;
    (vi) said variable width varies in a range of lower than 0.5 mm;
    (vii) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.5 mm;
    (viii) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.5 mm.
  7. Digital twin according to any one of the preceding claims, characterized in that said one ring-shaped structure having a variable surface power or each of said more ring-shaped structures having a variable surface power provide a variable surface power to said digital twin which is different to a surface power of a lens surface comprising said one or more ring-shaped structure (s) having said variable surface power outside a domain occupied by said one or more ring-shaped structure (s) having said variable surface power, varying within at least one range of the following group of ranges:
    A) a difference in surface power varying within a range of larger than 6 dioptres and equal or lower than 12 dioptres;
    B) a difference in surface power varying within a range of larger than 7 dioptres and equal or lower than 11 dioptres;
    C) a difference in surface power varying within a range of larger than 8 dioptres and equal or lower than 10 dioptres.
  8. Computer-implemented method configured for calculating a digital twin of a spectacle lens (100 to 300) for the purpose of a use of said digital twin for manufacturing the spectacle lens, said digital twin comprising one ring-shaped structure or more ring-shaped structures (101, 102, 103, …) or one ring-shaped diffusing structure or more ring-shaped diffusing structures (301, 302, 303, …) each having a respective uniform width (w101, w102, w103, …; w301, w302, w303, …) , the method comprising the steps of
    - determining a central zone (110, 210, 310, …) on a lens surface of said digital twin such as to comprise a central zone width (cw110, cw210, cw310, …) within a range of 6 mm to 9.4 mm;
    - arranging said one ring-shaped structure or said more ring-shaped structures (101, 102, 103, …) such that said one ring-shaped structure or an innermost of said more ring-shaped structures is positioned adjacent and along said central zone or arranging said one ring-shaped diffusing structure or said more ring-shaped diffusing structures (301, 302, 303, …) such that said one ring-shaped diffusing structure or an innermost of said more ring-shaped diffusing structures is positioned adjacent and along said central zone;
    - in case of more ring-shaped structure or in case of more ring-shaped diffusing structures determining a surface-based fill factor (sf101, sf201) defined as a surface area ratio of a surface area of an innermost of said more ring-shaped structures (101, 102, 103, …) or of an innermost of said more ring-shaped diffusing structures (301, 302, 303, …) and a sum of said surface area of said innermost ring-shaped structure of said more ring-shaped structures (101, 102, 103, …) or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures (301, 302, 303, …) and a surface area of a peripheral zone (110, 210, 310, …) , such that said surface-based fill factor is
    o larger than 17 %and equal or lower than 70%for said uniform width (w101, w102, w103, …; w301, w302, w303, …) of said more ring-shaped structures (101, 102, 103, …) or said more ring-shaped diffusing structures (301, 302, 303, …) in a range of 0.6 mm to 0.7 mm, or
    o larger than 15 %and equal or lower than 60 %for said uniform width (w101, w102, w103, …; w301, w302, w303, …) of said more ring-shaped structures (101, 102, 103, …) or said more ring-shaped diffusing structures (301, 302, 303, …) in a range of 0.5 mm to 0.6 mm, or
    o larger than 6 %and equal or lower than 50 %for said uniform width (w101, w102, w103, …; w301, w302, w303, …) of said more ring-shaped structures (101, 102, 103, …) or said more ring-shaped diffusing structures (301, 302, 303, …) lower than 0.5 mm;
    the method being characterized in the step of
    b) replacing at least one of
    - said one ring-shaped structure or of said one ring-shaped diffusing structure,
    - each of said more ring-shaped structures or each of said more ring-shaped diffusing structures,
    - at least one of said more ring-shaped structures or at least one of said more ring-shaped diffusing structures
    by
    - one ring-shaped diffractive structure or more ring-shaped diffractive structures,
    - one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power,
    - one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
    - one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width,
    or adding at least one of
    - one ring-shaped diffractive structure or more ring-shaped diffractive structures,
    - one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power,
    - one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
    - one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width,
    to
    - said one ring-shaped structure or said one ring-shaped diffusing structure,
    - said more ring-shaped structures or said more ring-shaped diffusing structures.
  9. Method according to claim 8, the method being characterized in the step of
    - determining said central zone such as to comprise an optical centre defined analogously as in ISO 13666: 2019 (E) , section 3.2.15, or a fitting point defined analogously as in ISO 13666: 2019 (E) , section 3.2.34, of said digital twin.
  10. Method according to any one of preceding claims 8 and 9, the method being characterized in the step of
    - determining said uniform width (w101, w102, w103, …; w201, w202, w103, …) of at least one of the group consisting of one ring-shaped structure, more ring-shaped structures (101, 102, 103, …) , one ring-shaped diffusing structure, and more ring-shaped diffusing structures (301, 302, 303, …) such as to be set within at least one range of the following group of ranges:
    (i) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is larger than 0.2 mm and equal or lower than 0.7 mm;
    (ii) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is larger than 0.3 mm and equal or lower than 0.7 mm;
    (iii) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is equal or lower than 0.6 mm;
    (iv) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is larger than 0.2 mm and equal or lower than 0.6 mm;
    (v) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is larger than 0.3 mm and equal or lower than 0.6 mm;
    (vi) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is equal or lower than 0.5 mm;
    (vii) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is larger than 0.2 mm and equal or lower than 0.5 mm;
    (viii) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is larger than 0.3 mm and equal or lower than 0.5 mm.
  11. Method according to any one of the preceding claims 8 to 10, the method being characterized in the step of
    - determining said central zone width (cw110, cw210, cw310, …) such as to be set within at least one range of the following group of ranges:
    (i) said central zone width (cw110, cw210, cw310, …) is larger than 6 mm and lower than or equal to 7 mm;
    (ii) said central zone width (cw110, cw210, cw310, …) is larger than 7 mm and lower than or equal to 9.4 mm.
  12. Method according to any one of the preceding claims 8 to 11, the method being characterized in the step of
    - determining a surface of said one ring-shaped structure or determining each surface of said more ring-shaped structures such that each provide a surface power to said digital twin which is different to a surface power of a lens surface comprising said one or more ring-shaped structure (s) outside a domain occupied by said ring-shaped structure (s) within at least one range of the following group of ranges:
    A) a difference in surface power being within a range of larger than 6 dioptres and equal or lower than 12 dioptres;
    B) a difference in surface power being within a range of larger than 7 dioptres and equal or lower than 11 dioptres;
    C) a difference in surface power being within a range of larger than 8 dioptres and equal or lower than 10 dioptres.
  13. Method according to any one of the preceding claims 8 to 12, the method being characterized in the step of
    - determining said variable width of at least one of the group consisting of said one ring-shaped structure having a variable width, said more ring-shaped structures each having a variable width, said one ring-shaped diffusing structure having a variable width, and said more ring-shaped diffusing structures each having a variable width such as to vary within at least one range of the following group of ranges:
    (i) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.7 mm;
    (ii) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.7 mm;
    (iii) said variable width varies in a range of lower than 0.6 mm;
    (iv) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.6 mm;
    (v) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.6 mm;
    (vi) said variable width varies in a range of lower than 0.5 mm;
    (vii) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.5 mm;
    (viii) said variable width varied in a range of larger than 0.3 mm and equal or lower than 0.5 mm.
  14. Method according to any one of the preceding claims 8 to 13, the method being characterized in the step of
    - determining a variable surface power for said one ring-shaped structure having a variable surface power or for each of said more ring-shaped structures having a variable surface power such that the variable surface power is different to a surface power of a lens surface comprising said one or more ring-shaped structure (s) having said variable surface power outside a domain occupied by said one or more ring-shaped structure (s) having said variable surface power, varying within at least one range of the following group of ranges:
    A) a difference in surface power varying within a range of larger than 6 dioptres and equal or lower than 12 dioptres;
    B) a difference in surface power varying within a range of larger than 7 dioptres and equal or lower than 11 dioptres;
    C) a difference in surface power varying within a range of larger than 8 dioptres and equal or lower than 10 dioptres.
  15. Computer comprising a processor configured to perform the method of any one of preceding claims 8 to 14.
  16. Computer program comprising instructions which, when the program is executed by a computer, cause the computer to carry out the method of any one of preceding claims 8 to 14.
  17. Computer-readable medium comprising instructions which, when executed by a computer, cause the computer to carry out the method of any one of preceding claims 8 to 14.
  18. Computer-readable data carrier having stored thereon the computer program of claim 16.
  19. Data carrier signal carrying the computer program of claim 16.
  20. Spectacle lens (100 to 300) comprising
    - one ring-shaped structure or more ring-shaped structures (101, 102, 103, …) or
    - one ring-shaped diffusing structure or more ring-shaped diffusing structures (301, 302, 303, …)  each having a respective uniform width (w101, w102, w103, …; w301, w302, w303, …) , said spectacle lens (100 to 300) comprising at least one first additional feature of the following group of first features:
    (i) a central zone (110, 210, 310, …) having a central zone width (cw110, cw210, cw310, …) within a range of 6 mm to 9.4 mm and said uniform width (w101, w102, w103, …; w301, w302, w303, …) being equal to or lower than 0.7 mm;
    (ii) said uniform width (w101, w102, w103, …; w301, w302, w303, …) being lower than 0.5 mm;
    (iii) a surface-based fill factor (sf101, sf201) defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said more ring-shaped structures (101, 102, 103, …) or of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures (301, 302, 303, …) and a sum of said surface area of said innermost ring-shaped structure of said more ring-shaped structures (101, 102, 103, …) or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures (301, 302, 303, …) and a surface area of a peripheral zone (110, 210, 310, …) , said surface-based fill factor (sf101, sf201) being larger than 17 %and equal or lower than 70%for said uniform width (w101, w102, w103, …; w301, w302, w303, …) of said more ring-shaped structures (101, 102, 103, …) or said more ring-shaped diffusing structures (301, 302, 303, …) in a range of 0.6 mm to 0.7 mm;
    (iv) a surface-based fill factor (sf101, sf201) defined as a surface area ratio of a surface area an innermost ring-shaped structure of said more ring-shaped structures (101, 102, 103, …) or of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures (301, 302, 303, …) and a sum of said surface area of said innermost ring-shaped structure of said more ring-shaped structures (101, 102, 103, …) or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures (301, 302, 303, …) and a surface area of a peripheral zone (110, 210, 310, …) , said surface-based fill factor (sf101, sf201) being larger than 15 %and equal or lower than 60 %for said uniform width (w101, w102, w103, …; w301, w302, w303, …) of said more ring-shaped structures (101, 102, 103, …) or said more ring-shaped diffusing structures (301, 302, 303, …) in a range of 0.5 mm to 0.6 mm;
    (v) a surface-based fill factor (sf101, sf201) defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said more ring-shaped structures (101, 102, 103, …) or of an innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures (301, 302, 303, …) and a sum of said surface area of said an innermost ring-shaped structure of said more ring-shaped structures (101, 102, 103, …) or said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures (301, 302, 303, …) and a surface area of a peripheral zone (110, 210, 310, …) , said surface-based fill factor (sf101, sf201) being larger than 6 %and equal or lower than 50 %for said uniform width (w101, w102, w103, …; w301, w302, w303, …) of said more ring-shaped structures (101, 102, 103, …) or said more ring-shaped diffusing structures (301, 302, 303, …) lower than 0.5 mm,
    said spectacle lens being characterized in comprising at least one second additional feature of the following group of second features:
    - one ring-shaped diffractive structure or more ring-shaped diffractive structures,
    - one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power,
    - one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
    - one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width,
    each of said second features
    a) instead of said one ring-shaped structure, instead of said more ring-shaped structures or instead of at least one of said more ring-shaped structures, or
    b) instead of said one ring-shaped diffusing structure, instead of said more ring-shaped diffusing structures or instead of a least one of said more ring-shaped diffusing structures, or
    c) additionally to said one ring-shaped structure or additionally to said more ring-shaped structures, or
    d) additionally to said one ring-shaped diffusing structure or additionally to said more ring-shaped diffusing structures.
  21. Spectacle lens (100 to 300) according to claim 20, characterized in that said central zone comprises an optical centre as defined in ISO 13666: 2019 (E) , section 3.2.15, or a fitting point as defined in ISO 13666: 2019 (E) , section 3.2.34, of said spectacle lens.
  22. Spectacle lens (100 to 300) according to any one of the preceding claims 20 and 21, characterized in that said uniform width (w101, w102, w103, …; w201, w202, w103, …) is within at least one range of the following group of ranges:
    (i) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is larger than 0.2 mm and equal or lower than 0.7 mm;
    (ii) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is larger than 0.3 mm and equal or lower than 0.7 mm;
    (iii) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is equal or lower than 0.6 mm;
    (iv) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is larger than 0.2 mm and equal or lower than 0.6 mm;
    (v) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is larger than 0.3 mm and equal or lower than 0.6 mm;
    (vi) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is equal or lower than 0.5 mm;
    (vii) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is larger than 0.2 mm and equal or lower than 0.5 mm;
    (viii) said uniform width (w101, w102, w103, …; w201, w202, w103, …) is larger than 0.3 mm and equal or lower than 0.5 mm.
  23. Spectacle lens (100 to 300) according to any one of the preceding claims 20 to 22, characterized in that said central zone width (cw110, cw210, cw310, …) is within at least one range of the following group of ranges:
    (i) said central zone width (cw110, cw210, cw310, …) is larger than 6 mm and lower than or equal to 7 mm;
    (ii) said central zone width (cw110, cw210, cw310, …) is larger than 7 mm and lower than or equal to 9.4 mm.
  24. Spectacle lens (100 to 300) according to any one of the preceding claims 20 to 23, characterized in that said one ring-shaped structure or each of said more ring-shaped structures provide (s) a surface power to said spectacle lens which is different to a surface power of a lens surface comprising said one or more ring-shaped structure (s) outside a domain occupied by said ring-shaped structure (s) , within at least one range of the following group of ranges:
    A) a difference in surface power being within a range of larger than 6 dioptres and equal or lower than 12 dioptres;
    B) a difference in surface power being within a range of larger than 7 dioptres and equal or lower than 11 dioptres;
    C) a difference in surface power being within a range of larger than 8 dioptres and equal or lower than 10 dioptres.
  25. Spectacle lens (100 to 300) according to any one of the preceding claims 20 to 24, characterized in that said variable width varies within at least one range of the following group of ranges:
    (i) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.7 mm;
    (ii) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.7 mm;
    (iii) said variable width varies in a range of lower than 0.6 mm;
    (iv) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.6 mm;
    (v) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.6 mm;
    (vi) said variable width varies in a range of lower than 0.5 mm;
    (vii) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.5 mm;
    (viii) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.5 mm.
  26. Spectacle lens (100 to 300) according to any one of the preceding claims 20 to 25, characterized in that said one ring-shaped structure having a variable surface power or each of said more ring-shaped structures having a variable surface power provide a variable surface power to said spectacle lens which is different to a surface power of a lens surface comprising said one or more ring-shaped structure (s) having said variable surface power outside a domain occupied by said one or more ring-shaped structure (s) having said variable surface power, varying within at least one range of the following group of ranges:
    A) a difference in surface power varying within a range of larger than 6 dioptres and equal or lower than 12 dioptres;
    B) a difference in surface power varying within a range of larger than 7 dioptres and equal or lower than 11 dioptres;
    C) a difference in surface power varying within a range of larger than 8 dioptres and equal or lower than 10 dioptres.
PCT/CN2023/076348 2023-02-16 2023-02-16 Digital twin of a spectacle lens and spectacle lens WO2024168652A1 (en)

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PCT/EP2024/054080 WO2024170781A1 (en) 2023-02-16 2024-02-16 Spectacle lens and method

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019166659A1 (en) 2018-03-01 2019-09-06 Essilor International Lens element
EP3561578A1 (en) 2018-04-26 2019-10-30 Essilor International (Compagnie Generale D'optique) Lens element
CN111103701A (en) 2020-01-02 2020-05-05 温州医科大学 Spectacle lens with annulus cylindrical microstructure on surface
WO2020180817A1 (en) 2019-03-01 2020-09-10 Sightglass Vision, Inc. Ophthalmic lenses for reducing myopic progression and methods of making the same
WO2020261213A1 (en) 2019-06-28 2020-12-30 Brien Holden Vision Institute Limited Ophthalmic lenses and methods for correcting, slowing, reducing, and/or controlling the progression of myopia
EP4006624A1 (en) * 2020-11-26 2022-06-01 Carl Zeiss Vision International GmbH Spectacle lens design, method of manufacturing a spectacle lens and method of providing a spectacle lens for at least retarding myopia progression
WO2022207858A1 (en) * 2021-03-31 2022-10-06 Carl Zeiss Vision International Gmbh Method for tinting or decoloring a lens, lens obtainable by the method for tinting or decoloring a lens, lens comprising a tint or decolorization, lens holder and tinting device for tinting a lens
WO2022251713A1 (en) 2021-05-28 2022-12-01 Sightglass Vision, Inc. Ophthalmic lenses for reducing myopia progression and laser based methods for forming the same
WO2023275189A1 (en) * 2021-06-30 2023-01-05 Essilor International Lens element

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019166659A1 (en) 2018-03-01 2019-09-06 Essilor International Lens element
EP3561578A1 (en) 2018-04-26 2019-10-30 Essilor International (Compagnie Generale D'optique) Lens element
WO2020180817A1 (en) 2019-03-01 2020-09-10 Sightglass Vision, Inc. Ophthalmic lenses for reducing myopic progression and methods of making the same
WO2020261213A1 (en) 2019-06-28 2020-12-30 Brien Holden Vision Institute Limited Ophthalmic lenses and methods for correcting, slowing, reducing, and/or controlling the progression of myopia
CN111103701A (en) 2020-01-02 2020-05-05 温州医科大学 Spectacle lens with annulus cylindrical microstructure on surface
EP4006624A1 (en) * 2020-11-26 2022-06-01 Carl Zeiss Vision International GmbH Spectacle lens design, method of manufacturing a spectacle lens and method of providing a spectacle lens for at least retarding myopia progression
WO2022207858A1 (en) * 2021-03-31 2022-10-06 Carl Zeiss Vision International Gmbh Method for tinting or decoloring a lens, lens obtainable by the method for tinting or decoloring a lens, lens comprising a tint or decolorization, lens holder and tinting device for tinting a lens
WO2022251713A1 (en) 2021-05-28 2022-12-01 Sightglass Vision, Inc. Ophthalmic lenses for reducing myopia progression and laser based methods for forming the same
WO2023275189A1 (en) * 2021-06-30 2023-01-05 Essilor International Lens element

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