TWI821026B - Anti-fatigue contact lens - Google Patents

Abstract

An anti-fatigue contact lens includes an optical zone, and the optical zone is an aspherical surface. The optical zone includes a center zone and a periphery zone. The center zone includes a center, a near zone, and a pressure modulation zone. The dipolar of the near zone is a constant value. The pressure modulation zone surrounds the near zone, and the pressure modulation zone has a ring shape. The pressure modulation zone is connected with the near zone. The periphery zone surrounds the center zone, and the dipolar of the periphery is a constant value. The anti-fatigue contact lens has a cylinder power and a cylinder axis, and therefore such design can relief the pressure in near vision of astigmatism patients.

Description

pressure relief contact lenses

This disclosure is about a pressure relief contact lens.

Myopia correction lenses provide a single-focal design. Although they can effectively focus on the center of the retina and correct myopia, when looking at near objects for a long time, they will cause excessive adjustment of the ciliary muscles, resulting in reduced focusing ability, temporary blurred vision, and long-term fatigue. Will cause presbyopia to occur earlier.

In the design of some myopia correction lenses, a general spherical optical design is adopted, which causes spherical aberration around the optical zone. The pupil size is larger at night or in dark environments, and spherical aberration will cause unclear vision or halo blur when viewing distant objects.

In view of this, how to provide a pressure-relieving contact lens that can solve the above problems is still one of the current research goals of the industry.

One technical aspect of this disclosure is a pressure-relieving contact lens.

In an embodiment of the present disclosure, the pressure relief contact lens includes an optical zone, and the optical zone is an aspheric surface. The optical zone includes the central zone and the peripheral zone. The central zone has a center and contains the near vision zone and the pressure regulation zone. The diopter of the near vision zone is a fixed value. The pressure regulation zone surrounds the near vision zone and is annular. The pressure regulation area is connected to the near vision area. The peripheral area surrounds the central area, and the diopter of the peripheral area is a constant value.

In an embodiment of the present disclosure, the diopter of the pressure adjustment zone decreases from the near vision zone toward the peripheral zone, and the addition power of the optical zone ranges from +0.25D to +0.75D.

In an embodiment of the present disclosure, the near vision zone has an outer diameter, and the distance from the outer diameter to the center is between 0.25 mm and 1.5 mm.

In an embodiment of the present disclosure, the pressure regulating area has an outer diameter, and the distance from the outer diameter to the center is between 0.5 mm and 2.5 mm.

In an embodiment of the present disclosure, the peripheral area has an outer diameter, and a distance from the outer diameter to the center is between 3.0 mm and 7.0 mm.

In an embodiment of the present disclosure, the ratio between the area of the peripheral area and the area of the pressure adjustment area ranges from 2.5 to 64.

In an embodiment of the present disclosure, the ratio between the area of the pressure adjustment area and the area of the central area ranges from 0.5% to 70%.

In an embodiment of the present disclosure, the diopter change amount along the radius of the peripheral area of the pressure relief contact lens ranges from 0 to -0.2 (D/mm).

In an embodiment of the present disclosure, the pressure relief contact lens is a hard contact lens, and the material of the pressure relief contact lens includes polymethyl methacrylate (PMMA).

In one embodiment of the present disclosure, the pressure relief contact lens is a soft contact lens, and the material of the pressure relief contact lens includes HEMA hydrogel or silicone hydrogel.

In one embodiment of the present disclosure, a pressure relief contact lens has an astigmatic refractive power and an astigmatic axis configured to correct astigmatism.

In an embodiment of the present disclosure, the astigmatic refractive power falls in the range of approximately -0.5D to -3.50D.

In one embodiment of the present disclosure, the astigmatism axis falls within a range of approximately 5 degrees to 180 degrees.

Another technical aspect of the present disclosure is a pressure relief contact lens.

In an embodiment of the present disclosure, the pressure relief contact lens includes an optical zone, and the optical zone is an aspheric surface. The optical zone includes the central zone and the peripheral zone. The central zone has a center and contains the near vision zone and the pressure regulation zone. The diopter of the near vision zone is a fixed value. The pressure regulation zone surrounds the near vision zone and is annular. The pressure regulation area is connected to the near vision area. The peripheral area surrounds the central area, and the refractive power of the peripheral area decreases in the radial direction.

In an embodiment of the present disclosure, the diopter of the pressure adjustment zone decreases from the near vision zone toward the peripheral zone, and the addition power of the optical zone ranges from +0.25D to +0.75D.

In an embodiment of the present disclosure, the near vision zone has an outer diameter, and the distance from the outer diameter to the center is between 0.25 mm and 1.5 mm.

In an embodiment of the present disclosure, the pressure regulating area has an outer diameter, and the distance from the outer diameter to the center is between 0.5 mm and 2.5 mm.

In an embodiment of the present disclosure, the peripheral area has an outer diameter, and a distance from the outer diameter to the center is between 3.0 mm and 7.0 mm.

In an embodiment of the present disclosure, the ratio between the area of the peripheral area and the area of the pressure adjustment area ranges from 2.5 to 64.

In an embodiment of the present disclosure, the ratio between the area of the pressure adjustment area and the area of the central area ranges from 0.5% to 70%.

In an embodiment of the present disclosure, the diopter change amount along the radius of the peripheral area of the pressure relief contact lens ranges from 0 to -0.2 (D/mm).

In an embodiment of the present disclosure, the pressure relief contact lens is a hard contact lens, and the material of the pressure relief contact lens includes polymethylmethacrylate.

In an embodiment of the present disclosure, the pressure relief contact lens is a soft contact lens, and the material of the pressure relief contact lens includes hydrogel or silicone hydrogel.

In one embodiment of the present disclosure, a pressure relief contact lens has an astigmatic refractive power and an astigmatic axis configured to correct astigmatism.

In an embodiment of the present disclosure, the astigmatic refractive power falls in the range of approximately -0.5D to -3.50D.

In one embodiment of the present disclosure, the astigmatism axis falls within a range of approximately 5 degrees to 180 degrees.

In the above embodiments, the near vision zone and the pressure adjustment zone of the pressure relief contact lens can provide a pressure reducing effect. Based on the human brain's automatic adjustment function after receiving visual images, setting up a central zone for decompression can avoid over-adjustment caused by long-term use of the eyes at close range. The image produced by the decompression zone is some distance away from the focal point, providing a pressure relief effect to relieve ciliary muscle accommodation stress. Therefore, the pressure-relieving contact lens of the present disclosure can reduce the problem of eye fatigue caused by excessive adjustment of ciliary muscles. In addition, aspheric pressure-relief contact lenses can prevent the peripheral image from being formed behind the retina and away from the retina, causing long-term overregulation of the ciliary muscles and accelerating the occurrence of presbyopia. In other words, aspheric pressure-relieving contact lenses can reduce spherical aberration, improve eye concentration and defocus effects, eliminate interference in imaging, and enhance distance vision.

A plurality of embodiments of the present invention will be disclosed in the drawings below. For clarity of explanation, many practical details will be explained in the following description. However, it will be understood that these practical details should not limit the invention. That is to say, in some embodiments of the present invention, these practical details are not necessary. In addition, for the sake of simplifying the drawings, some commonly used structures and components will be illustrated in a simple schematic manner in the drawings. Also, the thicknesses of layers and regions in the drawings may be exaggerated for clarity, and like reference numbers refer to the same elements in the description of the drawings.

Figure 1 is a side view of the optical zone 100 of the pressure relief contact lens 10 according to an embodiment of the present disclosure. Figure 2 is a top view of the optical zone 100 of the pressure relief contact lens 10 of Figure 1 . Refer to Figure 1 and Figure 2 at the same time. The optical zone 100 of the pressure relief contact lens 10 includes a central zone 110, a peripheral zone 120 and a center C. The central zone 110 includes a near vision zone 112 (Near Zone) and a pressure adjustment zone 114 (Relax Zone). Center C is the center position of the pressure relief contact lens 10 and is also the center position of the near vision zone 112 . Pressure regulation zone 114 surrounds near vision zone 112 . Peripheral zone 120 surrounds central zone 110 . The pressure adjustment area 114 and the peripheral area 120 are annular. The optical zone 100 of the present disclosure is aspherical. The optical zone 100 composed of the central zone 110 and the peripheral zone 120 of the pressure relief contact lens 10 is configured to enable the wearer to have clear vision at both near and far distances.

The pressure adjustment area 114 is connected to the near vision area 112 , that is, the pressure adjustment area 114 extends outward from the near vision area 112 . Specifically, the near vision zone 112 has an outer diameter 1122 , and the outer diameter 1122 is directly connected to the pressure adjustment zone 114 . In other words, there is no connecting area between the near vision area 112 and the pressure adjustment area 114 . The outer diameter 1122 of the near vision zone 112 is equivalent to the junction position of the near vision zone 112 and the pressure adjustment zone 114, and the diopter of the near vision zone 112 at this junction position is the same as the diopter of the pressure adjustment zone 114 at this junction position.

The pressure adjustment area 114 is connected to the peripheral area 120 , that is, the peripheral area 120 extends outward from the pressure adjustment area 114 . The pressure regulating zone 114 has an outer diameter 1142 and the outer diameter 1142 is directly connected to the peripheral zone 120 . In other words, there is no connecting area between the pressure adjustment area 114 and the peripheral area 120 . The outer diameter 1142 of the pressure adjustment area 114 is equivalent to the interface between the pressure adjustment area 114 and the peripheral area 120 , and the diopter of the pressure adjustment area 114 at this interface is the same as the diopter of the peripheral area 120 at this interface.

Figure 3 is a graph showing the relationship between diopter and radius of a pressure relief contact lens according to an embodiment of the present disclosure. Refer to Figures 2 and 3 at the same time. The position with a radius value of zero in Figure 3 represents the center C of the pressure relief contact lens 10 . The diopter of the near vision zone 112 is a constant value. In other words, the near vision area 112 is a fixed focus area. In this embodiment, the diopter of the peripheral area 120 is a constant value, but the disclosure is not limited thereto.

The diopter of the pressure adjustment area 114 decreases from the position of the outer diameter 1122 of the near vision area 112 toward the position of the outer diameter 1142 of the pressure adjustment area 114 , that is, the pressure adjustment area 114 is a zoom area. The difference between the diopter of the peripheral area 120 and the diopter of the near vision area 112 is the add power (ADD Power). The ADD Power in this disclosure ranges from +0.25D to +0.75D. Specifically, the diopter of the near vision zone 112 in this embodiment is -2.75D. The diopter of the pressure adjustment area 114 in this embodiment decreases from -2.75D to -3.25D. As shown in Figure 3, in a preferred embodiment, the addition degree of the optical zone 100 is +0.5D.

According to the above, the near vision zone 112 and the pressure adjustment zone 114 of the pressure relief contact lens 10 constitute the central zone 110 that can provide a pressure reducing effect. According to the automatic adjustment function of the human brain after receiving visual images, the central area 110 used for decompression can avoid excessive adjustment of the ciliary muscles caused by long-term use of eyes at close range. Therefore, the pressure relief contact lens 10 of the present disclosure can reduce the problem of premature presbyopia caused by eye fatigue caused by excessive adjustment of ciliary muscles.

The junction between the near vision zone 112 and the pressure adjustment zone 114 is the outer diameter 1122 of the near vision zone 112 , and the distance D1 from the outer diameter 1122 to the center C ranges from 0.25 mm to 1.5 mm. In Figure 3, the distance D1 is 0.5 mm as a preferred embodiment. The junction between the pressure adjustment area 114 and the peripheral area 120 is the outer diameter 1142 of the pressure adjustment area 114, and the distance D2 from the outer diameter 1142 to the center C is between 0.5 mm and 2.5 mm. In Figure 3, the distance D2 is 1.5 mm as a preferred embodiment. The peripheral area 120 has an outer diameter 1202, and a distance D3 from the outer diameter 1202 to the center C ranges from 3.0 mm to 7.0 mm. In Figure 3, the distance D3 is 4.0 mm as a preferred embodiment.

The ratio between the area of the peripheral region 120 and the area of the pressure regulating region 114 ranges from 2.5 to 64. In a preferred embodiment, based on the above example of distance D1 being 0.5 mm, distance D2 being 1.5 mm, and distance D3 being 4.0 mm, the ratio between the area of the peripheral area 120 and the area of the pressure adjustment area 114 is preferably 7.

The ratio between the area of the pressure regulating area 114 and the area of the central area 110 ranges from 0.5% to 70%. In a preferred embodiment, the ratio between the area of the pressure regulating zone 114 and the area of the central zone 110 is preferably about 15%.

As shown in Figure 1, the pressure relief contact lens 10 has a front curve 102 (Front Curve) and a back curve 104 (Base Curve). Generally speaking, the back arc 104 can be adjusted according to the characteristics of the wearer's eyeballs to adapt to the wearing needs of people with different symptoms or ages, while the front arc 102 can control the required degree. In this embodiment, the diopter change amount of the aspherical peripheral area 120 along the slope along the radius ranges from 0 to -0.2 (D/mm). In this embodiment, the radius of curvature can be adjusted by changing the profile of the front arc 102, but the disclosure is not limited thereto. In other embodiments, the contours of the front arc 102 and the back arc 104 can be adjusted according to the required curvature radius.

The disclosed pressure relief contact lens 10 is used to correct myopia while reducing the adjustment range and providing a pressure relief effect to slow down the progression of myopia. A low content of mydriatic agent can be added to the storage solution of the pressure relief contact lens 10 to relax the ciliary muscles of the eyeball to avoid over-adjustment of the eyeball. The pressure relief contact lens 10 can be a hard contact lens, a soft contact lens, or a hard high oxygen permeable contact lens. The material of the hard contact lens may include polymethyl methacrylate (PMMA), but the disclosure is not limited thereto. The material of the soft contact lens may include HEMA hydrogel or silicone hydrogel, but the disclosure is not limited thereto. Generally, the hydrogel component of common soft contact lenses is polyhydroxyethyl methacrylate (p-HEMA), and its air permeability (Dk/t x10-9) is approximately between 15 and 40. For example, Etafilcon A. Silicone hydrogel material refers to the addition of highly oxygen-permeable silicon material to the hydrogel. Its air permeability (Dk/t x10-9) is approximately between 50 and 150, for example, senofilcon A. In some embodiments, pressure relief contact lens 10 may be an anti-blue light lens. Anti-blue light lenses refer to the use of materials that can absorb or block part or all of the blue light wavelength between 380 nanometers and 500 nanometers. It is known that common techniques are dyeing or coating, which can achieve the above-mentioned functions of different blue light absorption rates.

For example, contact lenses are manufactured by using an ultra-precision processing machine (for example: Ametek Optoform80) and processing hard polymer materials (for example: PMMA) by combining the front arc 102 and the back arc 104 of single or multiple curvature radii. Comply with the optical characteristics and the adaptability of the corneal curvature of the eyeball. Soft contact lenses are manufactured by a casting method that combines the upper half mold of the back curve 104 with the lens optics and configuration and the lower half mold of the front curve 102. The liquid soft contact lens polymer material is filled into the upper half mold and the lower half mold. In the mold cavity, it is polymerized at high temperature to become a solid state, and then hydrated, sealed with a preservation liquid (such as PP blister packing), and sterilized to make the finished product.

Figure 4 is a graph showing the relationship between diopter and radius of a pressure relief contact lens according to another embodiment of the present disclosure. The embodiment of FIG. 4 is substantially the same as the embodiment of FIG. 3 , with the difference being the diopter of the peripheral area 120 . Refer to Figures 2 and 4 at the same time. The refractive power of the peripheral area 120 decreases in the radial direction, that is, the refractive power of the peripheral area 120 decreases as the distance from the center C increases. In this embodiment, the diopter of the peripheral area 120 decreases in a linear manner, but the disclosure is not limited thereto. In other embodiments, the diopter of peripheral zone 120 may decrease in a curve.

Figure 5 is an imaging simulation diagram of a pressure relief contact lens according to an embodiment of the present disclosure. Figure 5 shows an imaging simulation diagram when a user wearing the pressure relief contact lens 10 views a close object. The image 500 produced by the peripheral region 120 and the image 700 produced by the pressure adjustment region 114 are shown as dashed lines in FIG. 5 . The wearer's ciliary muscle 300 contracts to adjust the lens 200 so that the light L1 of the object is imaged at the focus 600 .

The aspheric pressure relief contact lens 10 can prevent the image 500 of the peripheral area 120 from being formed behind the retina 400 and away from the retina 400, causing the ciliary muscle 300 to over-regulate for a long time and accelerating the occurrence of presbyopia. In other words, the aspheric pressure relief contact lens 10 can reduce spherical aberration, improve eye concentration and defocusing effects, eliminate interference in imaging, and enhance vision when viewing distant objects. The image 700 generated by the pressure adjustment area 114 is at a distance from the focus 600, providing a pressure relief effect to reduce the adjustment pressure of the ciliary muscle 300.

Figure 6 is an imaging simulation diagram of a pressure relief contact lens according to another embodiment of the present disclosure. Figure 6 shows an imaging simulation diagram of a user wearing the pressure relief contact lens 10 when viewing distant objects. The image 500 produced by the peripheral region 120 and the image 700 produced by the pressure adjustment region 114 are shown as dotted lines in FIG. 6 . The wearer's ciliary muscle 300 relaxes to adjust the lens 200 so that the light L2 of the object is imaged at the focal point 600 , which is located in front of the retina 400 . Since the image 500 generated by the peripheral area 120 is in front of the retina 400, the myopia deepening caused by the continuous growth of the eye axis can be avoided. Therefore, the pressure relief contact lens 10 of the present disclosure can enable the wearer to have clear visual effects when viewing both close objects and distant objects.

Figure 7A is a top view of a pressure relief contact lens 800 according to an embodiment of the present disclosure. The pressure relief contact lens 800 includes an astigmatism optical zone 810 and an astigmatism thickening stabilizing zone 820. The astigmatism thickening stable area 820 in this embodiment is located below the pressure relief contact lens 800 and is a Prism-Ballast type pressure relief contact lens 800.

Figure 7B is a top view of a pressure relief contact lens 800a according to another embodiment of the present disclosure. The pressure relief contact lens 800a also includes an astigmatism optical zone 810a and an astigmatism thickening stabilization zone 820a. This embodiment has two astigmatism thickening stable areas 820a, which are located on the left and right sides of the pressure relief contact lens 800a. They are a double slab-off type pressure relief contact lens 800a.

The above-mentioned astigmatism optical zones 810 and 810a both include the aforementioned near-field vision zone 112, the pressure adjustment zone 114 and the peripheral zone 120. Astigmatism is caused by the deformation of the cornea into a rugby ball shape, forming a double curvature surface with long and short axes. When correcting refractive error through contact lenses, the light traces passing through the long and short axes are not focused at the same focus, resulting in astigmatism. In the above embodiments, the pressure relief contact lens can have different curvature radii in different axes (major and minor axes) to improve the refractive error of astigmatism patients. The astigmatism thickening stabilizing areas 820 and 820a are configured so that the contact lens does not rotate after being worn to maintain correct corrective function. In this way, the light passing through the two axes with different refractive powers can be focused on the central fovea of the retina at the same time. Stable zone design is not limited to the above types.

Figure 8 is a diopter distribution diagram of a pressure relief contact lens according to an embodiment of the present disclosure. Specifically, astigmatism is a dual diopter change type, including spherical power (Sphere Power), astigmatism power (Cylinder Power), and astigmatism axis (Cylinder Axis). The embodiment in Figure 8 takes as an example a spherical diopter of -3.00D, an astigmatic diopter of -1.25D (astigmatism power of 125 degrees), and an astigmatism axis of 180 degrees. Therefore, the diopter at a pressure relief contact lens angle of 0 degrees and a pressure relief contact lens angle of 180 degrees is about -3.00D, and the diopter at a pressure relief contact lens angle of 90 degrees and a pressure relief contact lens angle of 270 degrees is about -4.25.

Figure 9 is a graph showing the relationship between diopter and radius along different angles within the optical zone of a pressure relief contact lens according to an embodiment of the present disclosure. Refer also to Figure 7A and Figure 10. Figure 7A shows the axial direction AX1 of 0 degrees, the axial direction AX2 of 45 degrees, and the axial direction AX3 of 90 degrees. Curves S1, S2, and S3 in Figure 9 respectively represent the relationship between diopter and radius along the axial directions AX1, AX2, and AX3. This embodiment takes the diopter distribution of the optical zone 100 shown in the aforementioned Figure 3 as an example. In this embodiment, the spherical diopter -3.00D, the astigmatic diopter -1.25D, the axial degree 180 degrees, and the addition +0.5D are taken as an example.

As shown by the curve S1, the relationship between the diopter and the radius along the axial direction AX1 is substantially the same as that of the embodiment in Figure 3. As shown in the curve S2, the relationship between the diopter and the radius along the axial direction AX2 increases the astigmatism diopter by about -0.63D compared to the curve S1. However, the curve S2 has a similar trend with the radius as the curve S1. As shown in the curve S3, the relationship between the diopter and the radius along the axial direction AX3 increases the astigmatism diopter by about -1.25D compared with the curve S1. However, the curve S3 has a similar trend with the radius as the curve S1. The above-mentioned optical designs can be placed on the same side of the pressure-relieving contact lens (the front arc 102 or the back arc 104) at the same time, or they can be placed on one side of the pressure-relieving contact lens respectively, both of which can have the effect of relieving pressure and correcting myopia and astigmatism.

In some embodiments, the pressure relief contact lens can have a spherical refractive power in the range of +10.0D to -12.0D, an astigmatic refractive power in the range of -0.50D to -3.50D, and an astigmatic axial power in the range of 5° to -12.0D. within the range of 180°. The appropriate spherical refractive power and astigmatic refractive power can be determined based on the patient's corneal deformation degree and orientation and myopia degree. Through this design, astigmatism caused by the diopter difference in the two axes can be corrected, and at the same time, the patient can have the effect of relieving intraocular pressure when viewing close objects.

Figure 10 is a graph showing the relationship between diopter and radius along different angles in the optical zone of a pressure relief contact lens according to an embodiment of the present disclosure. Curves S4, S5, and S6 in Figure 10 respectively represent the relationship between diopter and radius along the axial directions AX1, AX2, and AX3. This embodiment takes the diopter distribution of the optical zone 100 shown in the aforementioned Figure 4 as an example. In this embodiment, the spherical diopter -3.00D, the astigmatic diopter -1.25D, the axial degree 180 degrees, and the addition +0.5D are taken as an example.

As shown by the curve S4, the relationship between the diopter and the radius along the axial direction AX1 is substantially the same as that of the embodiment in Figure 4. As shown in the curve S5, the relationship between the diopter and the radius along the axial direction AX2 increases the astigmatism diopter by about -0.63D compared with the curve S4. However, the curve S5 has a similar trend with the radius as the curve S4. As shown in the curve S6, the relationship between the diopter and the radius along the axial direction AX3 increases the astigmatism diopter by about -1.25D compared with the curve S4. However, the curve S3 has a similar trend with the radius as the curve S1. The above-mentioned optical designs can be placed on the same side of the pressure-relieving contact lens (the front arc 102 or the back arc 104) at the same time, or they can be placed on one side of the pressure-relieving contact lens respectively, both of which can have the effect of relieving pressure and correcting myopia and astigmatism.

In summary, the near vision zone and the pressure adjustment zone of the pressure-relieving contact lens disclosed in the present disclosure can provide a pressure-reducing effect. According to the human brain's automatic adjustment function after receiving visual images, the central area used for decompression can avoid over-adjustment caused by long-term use of the eyes at close range. The image produced by the decompression zone is some distance away from the focal point, providing a pressure relief effect to relieve ciliary muscle accommodation stress. Therefore, the pressure-relieving contact lens disclosed in the present disclosure can reduce the problem of premature presbyopia caused by eye fatigue caused by excessive adjustment of ciliary muscles. In addition, aspheric pressure relief contact lenses can prevent the peripheral area of the image from forming behind the retina and away from the retina, resulting in long-term overregulation of the ciliary muscle. In other words, aspheric pressure-relief contact lenses can reduce spherical aberration, improve eye concentration and defocus effects, and eliminate interference in imaging to enhance vision when viewing distant objects. Pressure relief contact lenses can have different curvature radii in different axes (long and short axes) to improve the refractive error of astigmatism patients. The astigmatism thickening stabilization zone is configured so that the contact lens does not rotate after being worn to maintain correct correction function.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various modifications and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention is The scope shall be determined by the appended patent application scope.

10: Pressure relief contact lenses 100: Optical area 102: Front arc 104: Back arc 110:Central District 112: Near vision area 1122:Outer diameter 114: Pressure adjustment area 1142:Outer diameter 120: Surrounding area 1202:Outer diameter C:center D1, D2, D3: distance 200:Crystal 300:Ciliary muscle 400:Retina 500,700: Imaging 600:Focus L1, L2: light 800,800a: Pressure relief contact lenses 810,810a: Astigmatism optical zone 820,820a: Stable zone of astigmatism thickening AX1, AX2, AX3: axial S1~S6: Curve

Figure 1 is a side view of the optical zone of a pressure relief contact lens according to an embodiment of the present disclosure. Figure 2 is a top view of the optical zone of the pressure relief contact lens in Figure 1 . Figure 3 is a graph showing the relationship between diopter and radius of a pressure relief contact lens according to an embodiment of the present disclosure. Figure 4 is a graph showing the relationship between diopter and radius of a pressure relief contact lens according to another embodiment of the present disclosure. Figure 5 is an imaging simulation diagram of a pressure relief contact lens according to an embodiment of the present disclosure. Figure 6 is an imaging simulation diagram of a pressure relief contact lens according to another embodiment of the present disclosure. Figure 7A is a top view of a pressure relief contact lens according to an embodiment of the present disclosure. Figure 7B is a top view of a pressure relief contact lens according to another embodiment of the present disclosure. Figure 8 is a diopter distribution diagram of a pressure relief contact lens according to an embodiment of the present disclosure. Figure 9 is a graph showing the relationship between diopter and radius along different angles within the optical zone of a pressure relief contact lens according to an embodiment of the present disclosure. Figure 10 is a graph showing the relationship between diopter and radius along different angles in the optical zone of a pressure relief contact lens according to an embodiment of the present disclosure.

10: Pressure relief contact lenses

100: Optical area

102: Front arc

104: Back arc

110:Central District

112: Near vision zone

1122:Outer diameter

114: Pressure adjustment area

1142:Outer diameter

120: Surrounding area

1202:Outer diameter

C:center

D1, D2, D3: distance

Claims (26)

A pressure relief contact lens containing: An optical zone, wherein the optical zone is aspherical and the optical zone includes: A central area has a center and the central area contains: a near vision zone in which the diopter of the near vision zone is a constant value; and A pressure adjustment area surrounding the near vision area, wherein the pressure adjustment area is annular, and the pressure adjustment area is connected to the near vision area; and A peripheral area surrounds the central area, wherein the diopter of the peripheral area is a constant value. The pressure relief contact lens as described in claim 1, wherein the diopter of the pressure adjustment zone decreases from the near vision zone to the peripheral zone, and the addition power of the optical zone is in the range of +0.25D to +0.75D. The pressure relief contact lens of claim 1, wherein the near vision zone has an outer diameter, and a distance from the outer diameter to the center is between 0.25 mm and 1.5 mm. The pressure relief contact lens of claim 1, wherein the pressure adjustment area has an outer diameter, and a distance from the outer diameter to the center is between 0.5 mm and 2.5 mm. The pressure relief contact lens of claim 1, wherein the peripheral area has an outer diameter, and a distance from the outer diameter to the center is between 3.0 mm and 7.0 mm. The pressure relief contact lens of claim 1, wherein a ratio between the area of the peripheral area and the area of the pressure adjustment area is between 2.5 and 64. The pressure relief contact lens of claim 1, wherein a ratio between the area of the pressure adjustment zone and the area of the central zone is between 0.5% and 70%. The pressure relief contact lens of claim 1, wherein the diopter change amount of the peripheral area of the pressure relief contact lens along the radius is between 0 and -0.2 (D/mm). The pressure relief contact lens as described in claim 1, wherein the pressure relief contact lens is a hard contact lens, and the material of the pressure relief contact lens includes polymethyl methacrylate (PMMA). The pressure relief contact lens of claim 1, wherein the pressure relief contact lens is a soft contact lens, and the material of the pressure relief contact lens includes HEMA hydrogel or silicone hydrogel. The pressure relief contact lens of claim 1, wherein the pressure relief contact lens has an astigmatism diopter and an astigmatism axis configured to correct astigmatism. The pressure relief contact lens of claim 11, wherein the astigmatism refractive power falls in the range of about -0.5D to -3.50D. The pressure relief contact lens of claim 11, wherein the astigmatism axis falls in a range of about 5 degrees to 180 degrees. A pressure relief contact lens including: An optical zone, wherein the optical zone is aspherical and the optical zone includes: A central area has a center and the central area contains: a near vision zone in which the diopter of the near vision zone is a constant value; and A pressure adjustment area surrounding the near vision area, wherein the pressure adjustment area is annular, and the pressure adjustment area is connected to the near vision area; and A peripheral area surrounds the central area, wherein the diopter of the peripheral area decreases in the radial direction. The pressure relief contact lens of claim 14, wherein the diopter of the pressure adjustment zone decreases from the near vision zone to the peripheral zone, and the addition of the optical zone is in the range of +0.25D to +0.75D. The pressure relief contact lens of claim 14, wherein the near vision zone has an outer diameter, and a distance from the outer diameter to the center is between 0.25 mm and 1.5 mm. The pressure relief contact lens of claim 14, wherein the pressure adjustment zone has an outer diameter, and a distance from the outer diameter to the center is between 0.5 mm and 2.5 mm. The pressure relief contact lens of claim 14, wherein the peripheral area has an outer diameter, and a distance from the outer diameter to the center is between 3.0 mm and 7.0 mm. The pressure relief contact lens of claim 14, wherein a ratio between the area of the peripheral area and the area of the pressure adjustment area is between 2.5 and 64. The pressure relief contact lens of claim 14, wherein a ratio between the area of the pressure adjustment zone and the area of the central zone is between 0.5% and 70%. The pressure relief contact lens according to claim 14, wherein the diopter change amount of the peripheral area of the pressure relief contact lens along the slope along the radius is between 0 and -0.2 (D/mm). The pressure relief contact lens of claim 14, wherein the pressure relief contact lens is a hard contact lens, and the material of the pressure relief contact lens includes polymethyl methacrylate (PMMA). The pressure relief contact lens of claim 14, wherein the pressure relief contact lens is a soft contact lens, and the material of the pressure relief contact lens includes HEMA hydrogel or silicone hydrogel. The pressure relief contact lens of claim 14, wherein the pressure relief contact lens has an astigmatism diopter and an astigmatism axis configured to correct astigmatism. The pressure relief contact lens of claim 23, wherein the astigmatism refractive power falls in the range of about -0.5D to -3.50D. The pressure relief contact lens of claim 23, wherein the astigmatism axis falls in a range of about 5 degrees to 180 degrees.

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