KR101586630B1 - Contact lens having a plurality of grooves and forming method thereof - Google Patents

Abstract

The present invention relates to a contact lens having a plurality of grooves and a method of forming the contact lens, and more particularly, to a contact lens having a plurality of grooves and a method of forming the contact lens, comprising a visual part forming a central part, A first circulation groove formed on the inner surface of the contact lens along a boundary between the visual part and the visual eye part; and a second circulation groove formed on the inner surface of the contact lens along the boundary between the visual appearance part and the frame, A second circulation groove formed on the inner surface of the contact lens so that the first circulation groove and the second circulation groove are connected to each other; And an inflow / outflow groove formed in the contact lens, and a method of forming the contact lens.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a contact lens having a plurality of grooves and a method of forming the contact lens,

The present invention relates to a contact lens, and more particularly, to a contact lens having grooves formed so that tears can be smoothly circulated and discharged, and a method of forming such a contact lens.

Contact lenses are mounted on the entire surface of the eye, mainly on the cornea, to correct vision, help in the treatment of the eye, and also for the purpose of beauty. There is a thin tear layer between the worn contact lens and the cornea, which makes the contact lens close to the cornea, supplies the oxygen needed for the cornea, and helps the lubrication. When the eye is flickering, the contact lens moves slightly, Exchange is made. Such contact lenses may be classified into hard contact lenses (or hard lenses), soft contact lenses (or soft lenses), and gas permeable hard contact lenses, depending on the material. In addition, the contact lens can be classified into a daily wearing lens, a continuous wearing lens and a disposable lens depending on the wearing period. In addition, contact lenses are classified into refractive error correction lenses, cell layer treatment lenses, and cosmetic color soft lenses depending on the purpose of use.

Regardless of the type of contact lens worn, circulation of the tears is very important. For that reason, if the human eye does not maintain constant water at all times, the eyes of the wearer of the contact lens will suffer dry eye phenomenon or reaction that is the staining of the cornea. For tear circulation of conventional contact lenses, we have been focusing on the development of materials that depend mainly on oxygen permeability (DK). Recently, a new technology has been emerging as a method of circulating a tear by forming a hole in a contact lens. However, if artificial contact holes are formed in the contact lens, the corneal cells may grow in the holes and cause fatal eye disease.

Korean Patent Publication No. 2012-0031707 April 04, 2012 (name: lens having tear circulation and oxygen circulation function)

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a contact lens having a plurality of grooves for allowing tears to be circulated smoothly to the outer periphery of a contact lens without causing eye diseases, and a method for forming the same. .

According to another aspect of the present invention, there is provided a contact lens including a visual portion forming a central portion, a visual visual portion formed at an outer periphery of the visual portion, And a second circulation groove formed on an inner surface of the contact lens along a boundary between the visual sight portion and the rim portion, A contact groove formed on the inner surface of the contact lens so that the first circulation groove and the second circulation groove are connected to each other; and a contact groove formed on the inner surface of the contact lens so that the outer circumference of the contact lens is connected to the second circulation groove. / RTI >

The width of the inlet / outlet groove is narrowest at a portion connected to the second circulation groove, gradually increases toward the outer circumference, and widest at the outer circumference.

And an outer circumferential portion of the inflow / outflow groove has a predetermined curvature.

The visual display unit includes a pattern including at least one connection line formed to connect the first circulation groove and the second circulation groove, and the connection groove is formed along the connection line.

And a plurality of small protrusions formed on the surfaces of the first circulation groove, the second circulation groove, the connection groove, and the inflow / outflow groove.

In order to accomplish the above object, according to a preferred embodiment of the present invention, there is provided a contact lens comprising a visual portion forming a central portion, a visual visual portion formed on the outer periphery of the visual portion, and a rim portion formed on the outer periphery of the visual visual portion, The method comprising: providing an inner mold for forming an inner surface of the contact lens and an outer mold for forming an outer surface of the contact lens; injecting a monomer into the concave inner surface of the outer mold; Assembling the inner mold into a mold to polymerize the monomer in the form of a contact lens, and separating the outer mold from the inner mold to form a contact lens shape.

Here, the inner mold may include a first circulation protrusion for forming a first circulation groove on the inner surface of the contact lens along the boundary between the visual part and the visual sight part, and a second circulation protrusion for contacting the contact lens, A connection protrusion for forming a connection groove on the inner surface of the contact lens so that the first circulation groove and the second circulation groove are connected to each other, And an inflow / outflow protrusion for forming an inflow / outflow groove on the inner surface of the contact lens is formed so that the outer circumference of the contact lens is connected to the contact lens.

Wherein the first circulation protrusion, the second circulation protrusion, the connection protrusion, the inflow / outflow opening, and the second inflow / outflow protrusion are formed on the surfaces of the first circulation groove, the second circulation groove, And a plurality of small grooves are formed on the surface of the outflow projection.

In order to accomplish the above object, according to a preferred embodiment of the present invention, there is provided a contact lens comprising a visual portion forming a central portion, a visual visual portion formed on the outer periphery of the visual portion, and a rim portion formed on the outer periphery of the visual visual portion, The method comprising: providing an inner mold for forming an inner surface of the contact lens and an outer mold for forming an outer surface of the contact lens; injecting a monomer into the concave inner surface of the outer mold; A method of manufacturing a contact lens, comprising the steps of: polymerizing a monomer in the form of a contact lens by assembling the inner mold to a mold; separating the outer mold from the inner mold to form a contact lens shape; Forming a first circulation groove along the boundary between the visual part and the visual visual part, Wherein the first circulation groove and the second circulation groove are formed so as to connect with each other, and the outer circumference of the second circulation groove and the outer circumference of the contact lens form a connection groove, And forming an inlet / outlet groove to be connected.

The first circulation groove, the second circulation groove, the connection groove, and the second connection groove are formed so that a plurality of small projections are formed on the surfaces of the first circulation groove, the second circulation groove, the connection groove, And performing a plasma treatment on the inlet / outlet grooves.

As described above, according to the present invention, the circulation of the tears in the contact lens is smoothly performed through the various grooves of the contact lens, and the tears are smoothly discharged. In particular, the grooves of the present invention have a rough surface with a plurality of small protrusions formed. Therefore, the surface tension of the tear circulating through the grooves is reduced, so that the tear circulation can be smoothly performed. Therefore, it is possible to prevent eye disease that tears may occur in the contact lenses.

1 is a plan view of a contact lens according to an embodiment of the present invention.
2 is a cross-sectional view of the AA 'portion of the contact lens of FIG.
3 is a view for explaining a shape of an inlet / outlet groove according to an embodiment of the present invention.
4 and 5 are views for explaining positions where connection grooves of a contact lens are formed according to an embodiment of the present invention.
6 is a view for explaining a plurality of small protrusions formed on the surface of a groove according to an embodiment of the present invention.
7 is a view for explaining the shape of a groove formed on the inner surface of the contact lens according to the embodiment of the present invention.
8A to 8E are views for explaining a contact lens forming method according to an embodiment of the present invention.
9 is a flowchart illustrating a method of forming a contact lens according to the first embodiment of the present invention.
10 is a flowchart illustrating a method of forming a contact lens according to a second embodiment of the present invention.

In the following description, only parts necessary for understanding the embodiments of the present invention will be described, and the description of other parts will be omitted so as not to obscure the gist of the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor is not limited to the meaning of the terms in order to describe his invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention, so that various equivalents And variations are possible.

FIG. 1 is a plan view of a contact lens according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line A-A 'of the contact lens of FIG.

1 and 2, a contact lens according to an exemplary embodiment of the present invention is integrally formed by being worn on a cornea, and the shape of the contact lens is curved according to the shape of the cornea. Further, as shown, the contact lens is circular in plan view and its cross section is hemispherical in the cavity.

The contact lens according to the embodiment of the present invention is divided into a visual part 100, a visual visual part 200, and a frame part 300. The visual portion 100 is circular in plan view and forms the central portion of the contact lens. The visual visual field 200 is an area extending from the visual field 100 and forming a ring-shaped top view on the outer periphery of the visual field 100. In addition, the rim 300 is a ring-shaped region on the outer periphery of the visual field part 200 in a plan view.

According to the embodiment of the present invention, the longitudinal grooves 410, 420, 500 and 600 are formed on the inner surface of the contact lens so that circulation of the tears smoothly occurs between the contact lens and the cornea. A ring-shaped groove is formed on the inner surface of the contact lens along the boundary between the visual part 100 and the visual field part 200, and this is referred to as a first circulation groove 410. A ring-shaped groove is formed on the inner surface of the contact lens along the boundary between the visual field part 200 and the rim 300, and this is referred to as a second circulation groove 420.

A plurality of connection grooves 500 are formed on the inner surface of the contact lens 200 so that the first circulation groove 410 and the second circulation groove 420 are connected to each other. A plurality of inflow / outflow grooves 600 are formed on the inner surface of the contact lens across the rim 300 so that the second circulation groove 420 and the outer periphery of the contact lens are connected.

After the tears flow out through the lacrimal gland, the tears flow into the contact lens through the inflow / outflow groove 600. The inflow tears can flow into the second circulation groove 420 along the inflow / outflow groove 600. The tears flow along the second circulation groove 420 and flow into the first circulation groove 410 through the connection groove 500 when the connection groove 500 is encountered. And a part of the tears flowing along the second circulation groove 420 may flow out of the contact lens through the inflow / outflow groove 600 when the inflow / outflow groove 600 is encountered. The tears flowing into the first circulation groove 410 through any one of the plurality of connection grooves 500 circulate through the first circulation groove 410 and then circulate through the second circulation groove 420 ). ≪ / RTI > The tears circulate through the second circulation groove 420 and can be discharged to the outside through the inflow / outflow groove 600 when the inflow / outflow groove 600 is encountered. As described above, according to the embodiment of the present invention, the tears can be smoothly circulated between the cornea and the contact lens through the above-described groove portions 410, 420, 500, and 600.

3 is a view for explaining a shape of an inlet / outlet groove according to an embodiment of the present invention.

3 shows an inflow / outflow groove 600 formed on the inner surface of the contact lens. As described above, the tears flow into or out of the contact lens through the inflow / outflow groove 600.

The inflow / outflow groove 600 is connected from the outer periphery of the contact lens to the second circulation groove 420. The width of the inflow / outflow groove 600 is widest at the outer periphery, And is narrowest at a portion connected to the second circulation groove 420. In other words, the inflow / outflow groove 600 extends from the second circulation groove 420 of the contact lens to the outer periphery, and the inflow / outflow groove 600 has a width in a portion connected to the second circulation groove 420 It is the narrowest, gradually becoming wider as it goes to the outer margin, and widest at the outer margin. When the tears are introduced into the contact lens, the inflow of tears due to the surface tension may be hindered. Therefore, the width of the inflow / outflow grooves 600 at the outer periphery is maximized to smooth the inflow of tears. Conversely, when the tears flow out to the contact lens, the leakage of the tears due to the surface tension may be hindered, so that the width of the inflow / outflow groove 600 of the outer circumferential portion can be made wider, have. As described above, according to the embodiment of the present invention, the width of the inflow / outflow groove 600 of the outer circumferential portion is maximized, so that the inflow and outflow of the tears can be smoothly performed. As a result, To be circulated.

4 and 5 are views for explaining positions where connection grooves of a contact lens are formed according to an embodiment of the present invention.

As shown in FIG. 4, when the contact lens is a color lens, a pattern may be formed on the visual field unit 200. Such patterns can be dyed through pigments. According to an embodiment of the present invention, the pattern of the cosmetic visual field 200 includes at least one connecting line through which the first circulating groove 410 and the second circulating groove 420 are connected, . In addition, the connection groove 500 formed in the visual display unit 200 is formed along the connection line. Accordingly, the pattern formed on the visual field part 200 may not be distorted due to the connection groove 500. That is, if the pattern is formed so as to intersect with the connection groove 500 in the visual field part 200, the pattern will be distorted in a pattern different from the original pattern due to the difference in thickness of the contact lens. Therefore, according to the embodiment of the present invention, the pattern formed in the visual field part 200 includes a plurality of connecting lines through which the first circulating groove 410 and the second circulating groove 420 are connected, The connection groove 500 is formed. FIG. 5 illustrates various patterns that can be formed in the visual field unit 200. FIG. The various patterns include a plurality of connecting lines through which the first circulating groove 410 and the second circulating groove 420 are connected, and the connecting groove 500 may be formed along the connecting line. Therefore, the distortion of the pattern due to the formation of the connection groove 500 is minimized, so that the aesthetic function unique to the color lens can be avoided.

6 is a view for explaining a plurality of small protrusions formed on the surface of a groove according to an embodiment of the present invention.

6 may be a cross-section of one of the first circulation groove 410, the second circulation groove 420, the connection groove 500, and the inlet / outlet groove 600. As shown in the figure, a plurality of small projections 900 are formed on the surface of the groove. The small protrusion 900 roughens the surface of the first circulation groove 410, the second circulation groove 420, the connection groove 500 and the inlet / outlet groove 600 to reduce the surface tension of the tears have. This allows the tears to smoothly flow along the first circulation groove 410, the second circulation groove 420, the connection groove 500, and the inflow / outflow groove 600. Here, although the small projection 900 is convex and shown as being rounded, the shape of the small projection 900 is not limited to this, and a plurality of small projections 900 may be formed in a sawtooth shape. Although the small protrusions 900 are formed to have the same size and shape, the small protrusions 900 are not formed in the same size and shape, and the first and second circulation grooves 410, A plurality of small protrusions 900 of different sizes and shapes may be formed when plasma processing is performed on the surface of one of the connection groove 500, the inlet / outlet groove 600, and the like.

7 is a view for explaining the shape of a groove formed on the inner surface of the contact lens according to the embodiment of the present invention.

In order to describe the shape of the grooves 410, 420, 500, 600 according to the embodiment of the present invention, a second circulation groove 420 is typically shown in FIG.

로 정의된다. The busbars of the curved surface of the second circulation groove 420 can be expressed by the following formula (1)

.

은 m차 다항식,

는 구면 좌표에서 원점에서 구면까지의 거리,

,

는 구면 좌표에서의 각도) (here,

Is an m-order polynomial,

Is the distance from the origin to the sphere in spherical coordinates,

,

Is the angle in spherical coordinates)

로 정의된다. The boundary portion 710 where the second circulation groove 420 and the contact lens portion where the second circulation groove 420 are not formed is formed as a curved surface, and the busline of the curved surface is formed as spherical coordinates

.

은 m차 다항식,

는 구면 좌표에서 원점에서 구면까지의 거리,

,

는 구면 좌표에서의 각도) (here,

Is an m-order polynomial,

Is the distance from the origin to the sphere in spherical coordinates,

,

Is the angle in spherical coordinates)

및 구면 좌표

각각의 초점 거리 간의 관계는 다음의 수학식 3과 같다. Here,

And spherical coordinates

The relationship between the respective focal lengths is represented by the following equation (3).

When the second circulation groove 420 is formed in the above-described shape, the boundary portion 710 where the contact lens portion where the second circulation groove 420 is not formed does not damage the cornea, The tear circulating in the second circulation groove 420 can be smoothly circulated along the second circulation groove 420.

FIGS. 8A to 8E are views for explaining a method of forming a contact lens according to an embodiment of the present invention, and FIG. 9 is a flowchart illustrating a method of forming a contact lens according to the first embodiment of the present invention.

Referring to FIG. 9, an inner mold 710 and an outer mold 720 are provided in step S110, as shown in FIG. 8A. As shown, the inner mold 710 is for forming the inner surface of the contact lens, and its cross-section has a generally convex inner surface. The outer mold 720 is for forming the outer surface of the contact lens and has a generally concave inner surface in cross section. The inner mold 710 is for forming the inner surface of the contact lens and the outer mold 720 is for forming the outer surface of the contact lens. Therefore, the overall shape has a curved surface according to the shape of the cornea.

Particularly, on the outer surface of the inner mold 710, a first circulation projection 410 for forming a first circulation groove 410 on the inner surface of the contact lens along the border between the visual part 100 of the co- A second circulation protrusion (not shown) for forming a second circulation groove 420 on the inner surface of the contact lens along the border between the eye visual part 200 and the rim 300, A connection protrusion (not shown) for forming a connection groove 500 on the inner surface of the contact lens so that the circulation groove 410 and the second circulation groove 420 are connected to each other, An inflow / outflow projection (not shown) for forming an inflow / outflow groove 600 is formed on the inner surface of the contact lens so as to connect the periphery. Particularly, the inner mold 710 has a first circulation groove 410, a second circulation groove 420, a connecting groove 500, and a plurality of small projections formed on the surface of the inlet / A plurality of small grooves (not shown) are formed on the surfaces of the projections, the second circulation projections, the connecting projections, and the inflow / outflow projections. Each of the plurality of small grooves may be formed concave. Further, the plurality of small grooves may be formed in a saw-tooth shape in cross section. And the shape and size may not be the same.

In step S120, a monomer 800a as a material of the contact lens is injected into the concave inner surface of the outer mold 720, as shown in FIG. 8B.

8C and 8D, the inner mold 710 is assembled to the outer mold 720 into which the monomer is injected, thereby polymerizing the monomer in the form of a contact lens.

In step S140, the outer mold 710 is separated from the inner mold 720 to complete the contact lens 800, as shown in FIG. 8E.

Although not shown, when a contact lens is formed of a color lens, a process of selectively forming a predetermined pattern through the pigment on the visual field part 200 may be further performed. The plurality of connection grooves 500 are formed on the inner surface of the contact lens so that the first circulation groove 410 and the second circulation groove 420 are connected. Accordingly, it is preferable that connection lines among the patterns formed in the visual field part 200 are formed along the connection groove 500. In contrast, a plurality of connecting lines among the patterns formed on the visual field unit 200 are formed across the first circulating groove 410 and the second circulating groove 420, and the connecting groove 500 is formed along the concave of the connecting line . Accordingly, when the color lens is formed, it is preferable that the connection protrusion of the inner mold 710 is also formed along the connection line according to the determined pattern.

10 is a flowchart illustrating a method of forming a contact lens according to a second embodiment of the present invention.

Referring to FIG. 10, an inner mold 710 and an outer mold 720 are provided in step S210, as shown in FIG. 8A. As shown, the inner mold 710 is for forming the inner surface of the contact lens and has a generally convex inner surface in cross section. The outer mold 720 is for forming the outer surface of the contact lens and has an inner surface whose cross section is entirely concave. 9, a first circulation protrusion for forming a first circulation groove 410 on the surface of the inner mold 710, a second circulation protrusion for forming a second circulation groove 420, Outflow groove for forming the inflow / outflow groove 600 and the connection projection for forming the inflow / outflow groove 500 are formed. However, according to the second embodiment with reference to Fig. 10, these individual projections are not formed in the inner mold 710. Fig.

In step S220, a monomer 800a as a material of the contact lens is injected into the concave inner surface of the outer mold 720, as shown in FIG. 8B.

In step S230, as shown in FIGS. 8C and 8D, the inner mold 710 is assembled to the outer mold 720 into which the monomer is injected, thereby polymerizing the monomer in the form of a contact lens.

In step S240, the outer mold 710 is separated from the inner mold 720 to complete the overall shape of the contact lens 800, as shown in FIG. 8E.

In step S250, a laser is irradiated to form a first circulation groove 410, a second circulation groove 420, a connection groove 500, and an inflow / outflow groove 600 on the inner surface of the contact lens 800 do.

Subsequently, in step S260, plasma processing is performed on the first circulation groove 410, the second circulation groove 420, the connection groove 500, and the inlet / outlet groove 600 to form the first circulation groove 410, A plurality of small protrusions 900 are formed on the surfaces of the circulation groove 420, the connection groove 500, and the inflow / outflow groove 600 to reduce the surface tension of the tears.

As described above, the contact lens formed according to the method of forming a contact lens according to the embodiment of the present invention is capable of smoothly circulating tears in the contact lens without inducing eye disease through various grooves, . In particular, the grooves of the present invention have a rough surface formed with a plurality of small protrusions or the like on the surface thereof, whereby the surface tension of the tear circulating through the grooves is reduced, and the circulation of the tears can be smoothly performed.

While the present invention has been described with reference to several preferred embodiments, these embodiments are illustrative and not restrictive. It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention and the scope of the appended claims.

100: Visual part 200: Beauty part
300: rim portion 410: first circulation groove
420: second circulation groove 500: connection groove
600: inlet / outlet groove 710: inner mold
720: outer mold 800a: monomer
800: contact lens shape 900: small projection

Claims (6)

In a contact lens,
A visual part forming a central part;
A beauty visual part forming an outer edge of the visual part;
An edge portion forming an outer edge of the visual perception portion;
A first circulation groove having a first circulation protrusion formed on an inner surface of the contact lens along a boundary between the visual part and the visual sight part;
A second circulation groove having a second circulation protrusion formed on the inner surface of the contact lens along the border line between the visual sight portion and the rim portion;
A plurality of connection grooves having connection protrusions formed on an inner surface of the contact lens to connect the first circulation groove and the second circulation groove; And
And a plurality of inflow / outflow grooves having inflow / outflow protrusions formed on the inner surface of the contact lens so that the second circulation groove and the outer circumference of the contact lens are connected to each other,
Wherein the plurality of small grooves formed on the surfaces of the first circulation projections, the second circulation projections, the connection projections, and the inflow / outflow projections has a saw-tooth-shaped cross section. The method according to claim 1,
Wherein the width of the inflow / outflow groove is narrowest at a portion connected to the second circulation groove, gradually increases toward the outer periphery, and widest at the outer periphery. The method according to claim 1,
Wherein at least one connecting line formed to connect the first circulation groove and the second circulation groove is formed in the visual field part, and the connection groove is formed along the connection line. The method according to claim 1,
Further comprising a plurality of small protrusions formed on a surface of the first circulation groove, the second circulation groove, the connection groove, and the inflow / outflow groove. 1. A method of forming a contact lens comprising a visual portion forming a central portion, a visual visual portion formed at an outer portion of the visual portion, and a rim portion formed at an outer portion of the visual visual portion,
Providing an inner mold for forming an inner surface of the contact lens and an outer mold for forming an outer surface of the contact lens;
Injecting a monomer into the concave inner surface of the outer mold;
Assembling the inner mold to the outer mold to polymerize the monomer in the form of a contact lens;
Separating the outer mold from the inner mold to form a contact lens shape; Including the
The inner mold
A first circulation protrusion for forming a first circulation groove on an inner surface of the contact lens along a boundary between the visual part and the visual sight part, and a second circulation protrusion for forming a second circulation projection on an inner surface of the contact lens along a boundary between the visual appearance part and the frame part. A second annular protrusion for forming a groove, a connecting protrusion for forming a connecting groove on the inner surface of the contact lens so that the first circulating groove and the second circulating groove are connected to each other, And an inflow / outflow protrusion for forming an inflow / outflow groove on the inner surface of the contact lens is formed so that the first circulation protrusion, the second circulation protrusion, the connection protrusion, and the inflow / Wherein a small groove of the small groove is formed and a cross-section of the small groove is formed in a sawtooth shape. 1. A method of forming a contact lens comprising a visual portion forming a central portion, a visual visual portion formed at an outer portion of the visual portion, and a rim portion formed at an outer portion of the visual visual portion,
Providing an inner mold for forming an inner surface of the contact lens and an outer mold for forming an outer surface of the contact lens;
Injecting a monomer into the concave inner surface of the outer mold;
Assembling the inner mold to the outer mold to polymerize the monomer in the form of a contact lens;
Separating the outer mold from the inner mold to form a contact lens shape; And
Forming a first circulation groove along the border between the visual part and the visual sight part by irradiating a laser to the inner surface of the contact lens shape and forming a second circulation groove along the boundary between the visual sight part and the frame part, Forming a connection groove to connect the first circulation groove and the second circulation groove and forming an inlet / outlet groove so that the outer circumference of the contact lens is connected to the second circulation groove;
The plasma processing is performed on the first circulation groove, the second circulation groove, the connection groove, and the inlet / outlet groove to form a surface of the first circulation groove, the second circulation groove, the connection groove, and the inlet / And forming a plurality of small protrusions for reducing the surface tension of the tears on the surface of the contact lens.

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