JP2001311915A - Contact lens and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contact lens which prevents unexpected loss while meeting many and diversified living styles and simplifies maintenance and control. SOLUTION: The contact lens is annularly provided with a color part 26 of a color different from the color possessed by the material of the lens and of a color different from the color of the iris 50 exclusive of its central part, by which the color part may be easily discriminated from the iris 50 in mounting. Then the contact lens 20 does not come into contact with the cornea 70 and the sclera 80 and does not inadvertently flaw the same when the contact lens is removed. If the color part 26 is provided with portions of the color or lightness different from that of the color part 26, visibility may be further enhanced. Further, if the right and left contact lenses are formed of different patterns, the discrimination of the right and left lenses is easier.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact lens used by being directly attached to a cornea, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a contact lens having a color different from the color of a lens material has been known. These color contact lenses are used for the purpose of medical treatment for treating iris abnormalities such as iris defect or iris resection, and for sizing for treating corneal white spots and the like.

Therefore, conventional color contact lenses are:
These demands have been met by applying the same pattern or the same color as that of a general iris visually recognized through the cornea to the entire contact lens or the entire annular portion excluding the pupil portion.

[0004]

However, a conventional contact lens having a colored portion imitates the color and pattern of a general iris, and has a problem that it is difficult to visually recognize the contact lens when worn. . That is, it is difficult to know whether or not the wearer wears the contact lens, and where the wearer wears the contact lens. When removing the contact lens, it is conceivable that the finger may directly touch the cornea by mistake.

When contact lenses are used for refractive errors such as myopia, hyperopia, astigmatism, presbyopia, etc., it is rare that both eyes have the same degree of refractive error.
Many users of contact lenses use a pair of contact lenses having different so-called powers (right and left) for correcting left and right visual acuity. In this case, the user has to separately maintain and manage a pair of contact lenses that are completely identical in appearance and require the same maintenance, separately on the left and right.

An object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide a contact lens which is easy to handle and easy to maintain and manage.

[0007]

Means for Solving the Problems and Their Functions / Effects In order to solve the above-mentioned problems, a contact lens according to the present invention is a contact lens having a ring-shaped colored portion on a peripheral portion of the lens except for a center portion, The gist is that the colored portion has at least a color portion different from the iris color. Therefore, even when the contact lens is worn, the colored portion can be easily discriminated without being mixed with the iris. As a result, there is no mishandling.
In addition, since the colored portion having a color portion different from the iris is provided in an annular shape on the peripheral portion of the lens, it can be easily formed regardless of the rotational position of the contact lens with respect to the pupil. Can be identified.

Here, the material and the like of the contact lens are as follows:
Various known materials are available, such as oxygen-impermeable hard contact lenses MMA (metal methacrylate), oxygen-permeable hard contact lenses SMA (siloxanyl methacrylate) and FMA (fluoromethacrylate), and hydrous soft contacts. HEMA of lens
(Hydroxyethyl methacrylate), N-VP (N
-Vinyl pyrrolidone), DMAA (dimethyl acrylamide), GMA (glycerol methacrylate), silicone rubber, butyl acrylate, dimethyl siloxane for non-water-containing soft contact lenses, collagen for biocompatible contact lenses, amino acid copolymer, etc. .

In addition, as a polymerizable monomer for a contact lens, a commonly used radically polymerizable compound can be considered. For example, one or more vinyl, allyl, acryl, or methacryl group may be present in the molecule. Any of the compounds that are commonly used as hard contact lens or soft contact lens materials can be used. Specifically, alkyl acrylate, siloxanyl acrylate, fluoroalkyl acrylate, hydroxyalkyl acrylate,
Acrylic esters such as polyethylene glycol acrylate and vinyl acrylate, derivatives of styrene, N
Vinyl compounds such as vinyl lactams and (poly) vinyl carboxylate; More specifically,
For example, styrene, acrylic acid, methyl acrylate,
Ethyl acrylate, n-butyl acrylate, phenyl acrylate, 2-hydroxyethyl acrylate,
2-hydroxypropyl acrylate, methacrylic acid,
Methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, 2-ethylhexyl methacrylate, isobornyl methacrylate, benzyl methacrylate, phenyl methacrylate, 2-methacryloyloxyethyl succinic acid, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 2-hydroxy Butyl methacrylate, fumaric acid and their esters, methacrylonitrile, N, N-dimethylacrylamide, N-vinyl-2-pyrrolidone and the like can be used.

As crosslinking agents, ethylene glycol dimethacrylate, diethylene glycol diacrylate, triethylene glycol diacrylate, propylene glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, 1,4-butanediol diacrylate, ,
Polyfunctional monomers such as 6-hexanediol diacrylate, glycerin diacrylate, divinylbenzene diallyl phthalate, and diethylene glycol bisallyl carbonate can be used.

[0011] The contact lens of the present invention having the above configuration can also adopt the following modes. First, the colored portion may be annular. In the case of an annular shape, symmetry with respect to the contact lens can be easily maintained, so that no matter how the contact lens is worn, its position and the like can be easily determined. In addition, the coloring portion may have a size at least partially overlapping the iris of the wearer. Since it overlaps with the iris, it is possible to cope with abnormalities or defects of the iris. Further, since there is a color portion different from the iris, the contact lens can be immediately identified even if it overlaps with the iris. Further, the coloring portion may be provided at a position corresponding to the outside of the iris of the wearer, and may have a color portion different from the sclera color. In this case, the colored part is located outside the iris,
Since it is different from the iris color and the color of the sclera (so-called white eye),
Contact lenses can be identified immediately.

Further, the colored portion may be asymmetrical with respect to the outer shape of the contact lens. In this case, it is easy to identify the wearing direction of the contact lens. That is, the contact lens can be classified into upper, lower, left and right. Further, the colored portion may be formed of a region where the brightness is equal to or less than a first predetermined value and a region where the brightness is equal to or more than a second predetermined value higher than the first predetermined value. This makes it easier to determine the colored portion.

[0013] The present invention is a contact lens set comprising at least two contact lenses, wherein a colored portion different from the color of the lens material is annularly arranged on the periphery of the lens, and the colored portion is provided. The gist is that at least one of the colors, shapes, and patterns of the contact lenses is different in the set of contact lenses.

According to such a configuration, even if the left and right contact lenses and the plurality of contact lenses for one eye are maintained and managed in the same manner, one of the paired contact lenses can be used in any of the left and right eyeballs. Whether it is suitable for
A plurality of contact lenses can be easily identified and handled easily. In addition, color, shape,
The difference in at least one of the patterns is a concept including, for example, a case where any one of the contact lenses has no colored portion.

On the other hand, as a method for manufacturing such a contact lens or a contact lens set, an ink is manufactured by mixing a predetermined dye with a monomer which is the same as or different from the material of the contact lens, and the ink is made to have a predetermined diameter or more. Injecting into a concave portion arranged in an annular shape, collecting ink in the concave portion with a pad, transferring the ink to a mold for contact lenses, and molding at least one surface of the contact lens with the transferred mold. Can be considered.

According to this manufacturing method, an ink in which a predetermined dye is mixed with a monomer which is the same as or different from the material of the contact lens is filled in the annularly arranged concave portion having a predetermined diameter, and the ink in the concave portion is applied to the pad. The contact lens is then printed on a contact lens mold, and at least one surface of the contact lens is molded using the printed mold. Therefore, according to this manufacturing method, it becomes easy to provide a plurality of colored portions in a ring shape with a predetermined diameter on the contact lens. As a method of manufacturing a contact lens using such a mold, there are a spin casting method in which a monomer as a contact lens material is injected into a rotating mold, and this is spread and polymerized by centrifugal force. A molding method in which a mold is poured and a convex shape is formed and molded is known. Also,
In recent years, as disclosed in U.S. Pat. No. 4,555,372, a manufacturing method in which the front surface is formed by a mold and the rear surface is lace-cut, and conversely, the rear surface is formed by a mold and the front surface is lace-cut. Manufacturing methods have been proposed, and any of these methods can be adopted as the method for manufacturing the contact lens of the present invention.

Here, as the pigment, iron oxide, Tita
nium dioxide, Phthalocyanine green, Phthalocyanine
blue, Reactive Red11, Reactive Yellow86, Reactive
Black5 or the like can be used alone or appropriately compounded. Further, as the concave portion into which the ink is injected, a metal plate which can be easily finely processed can be used, and a copper plate is particularly suitable. As a pad for collecting the ink, a material such as a soft polymer having physical properties that are scientifically stable with respect to the monomer is suitable, and silicon is particularly preferable. As a mold for printing ink, polyvinyl resin is suitable, but a metal mold or the like can also be used. The contact lens manufactured in this manner does not require significant addition or modification of the manufacturing process in manufacturing the colored portion. Further, if the formed colored portion is formed from the same monomer as the contact lens, the optical characteristics are the same and the contact portion can be used as a contact lens for correcting refractive error. If different monomers are used, the characteristics of the monomers can be used for the colored portion. In such a configuration, since the pigment used for coloring is mixed with the monomer, the colored portion is completely integrated with the contact lens, and even if the pigment component alone has a property of being deteriorated by tears or the like, it should be used. Can be.

As a method of manufacturing a contact lens, in addition to the above-described method involving molding, the front surface (the surface where light rays from the outside contact first) and the rear surface (the surface which contacts the cornea) are cut from a polymer. There is a race cut method to put out. When this manufacturing method is adopted, the contact lens of the present invention can be obtained by shaving a contact lens having a desired shape in advance, and thereafter disposing the colored portion in a ring shape. In this case, the arrangement of the colored part is as follows: after shaving the front or rear side of the lens, transfer the ink to this surface,
The polymerization may be performed using a method of polymerizing the ink, polishing the surface, and then cutting the opposite surface.

In the method for manufacturing a contact lens, the first ink is injected into a first concave portion having a predetermined diameter and arranged in an annular shape, and the ink in the first concave portion is collected by a pad. And transferred to a contact lens mold, injecting the second ink into a second recess having a different shape from the second recess, collecting the ink in the second recess with a pad, and contacting the contact. It is also possible to transfer it to a lens mold, and to mold at least one surface of the contact lens with the transferred mold. According to such a method for manufacturing a contact lens, a colored portion can be formed using the first and second inks, so that a pattern, a pattern, and the like can be easily realized.

On the other hand, in such a method of manufacturing a contact lens, sampling of the ink from the first recess and sampling of the ink from the second recess are performed by the single pad. A manufacturing method in which transfer to a molding die is performed at one time is also feasible. In this way, the transfer process using the pad can be performed once, and the manufacturing process can be simplified.

Further, in the method of manufacturing a contact lens, the ink collected from the first concave portion is transferred to one of the molds of the contact lens using a pad, and the ink collected from the second concave portion is transferred to a pad. It is also possible to transfer the contact lens to the other of the molds, and use the transferred mold to mold both surfaces of the contact lens.
According to such a method for manufacturing a contact lens, it is possible to form a contact lens by transferring ink to one surface and the other surface of the contact lens. Therefore, the colored portions can be present on both sides, and a colored portion having a three-dimensional effect can be obtained.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the structure and operation of the present invention described above, embodiments of the contact lens of the present invention will be described below. FIG.
1 is a front view of a contact lens 10 according to an embodiment of the present invention. As shown, the contact lens 10 of the present embodiment is
Is a general contact lens having a circular outer shape, being entirely colorless and transparent, and having desired optical characteristics. Of the virtual lines indicated by dotted lines in the figure, the outer dotted line is
The optical part 1 having the optical effect of the contact lens 10
2 and a bevel 14 located on the outer periphery thereof,
The inner dotted line 18 virtually shows the position of the human pupil when wearing. On the bevel 14, a ring-shaped colored portion 16 is arranged at a position overlapping the above-mentioned boundary line. Therefore, the colored portion 16 functions only as a mark without affecting the optical characteristics of the contact lens 10. The coloring portion 16 is colored differently from a human iris, for example, red or blue.

The contact lens 10 thus configured
When attached to the cornea, it does not mix with the color of the iris, so it can give a wide variety of impressions to people,
The added value is generated as a decorative item suitable for a varied life. Also, when detached from the cornea intentionally or carelessly, because of the discrete colored portions 16,
It can be clearly distinguished from surrounding natural objects. Therefore, its existence can be easily recognized, and unexpected loss or the like can be prevented. In addition, since the color of the colored portion 16 is different from the color of the iris, the coloring is intentionally performed and is not interpreted as being caused by diseases such as the iris and the cornea.

Next, a second embodiment of the present invention will be described. As shown in FIG. 2, the contact lens 10 </ b> A of the second embodiment includes six colored circular parts 17 at six locations separated by 60 degrees from each other in the colored part 16. This circular part 1
The color 7 is a portion having low brightness (dark color) as viewed from the coloring portion 16. For example, it is colored black, gray, indigo, dark green, dark blue, dark red, and the like. Other configurations are the same as those of the first embodiment.

The contact lens 10 according to the second embodiment.
According to A, since the colored portions 16 are further provided with the circular portions 17 having different colors and darkness (brightness), there is an advantage that the contact lens 10A can be more easily recognized. Further, since the circular portion 17 has a geometrical shape and a geometrical arrangement, the visibility in a mounted state is further enhanced. Also, the color of the iris differs greatly depending on the race or person, but since the color and brightness of the colored portion 16 and the circular portion 17 are different, even if the person of the iris is worn, the writing portion 16 is not affected. Alternatively, the circular portion 17 has a different color or brightness from the iris, and has an excellent effect that the circular portion 17 is not mixed with the iris.

Next, a contact lens set according to a third embodiment of the present invention will be described. FIG. 3 shows the contact lens 10 or the contact lens 10 shown in FIG.
It is a front view which shows the other contact lens 20 which comprises the contact lens set with A. The optical part 22 and the bevel 24 having the optical effect of the contact lens 20
A ring-shaped colored portion 26 is disposed near the boundary between the colored portions 26. Therefore, the colored portion 26 is also used for the contact lens 2.
It functions as a mark without significantly affecting the optical characteristics of 0. In this contact lens 20, the colored portion 2
Reference numeral 6 is colored darker than the colored portion 16 of the contact lens 10A, and six circular portions 27 are provided at positions overlapping the colored portion 26 in the same arrangement as the contact lens 10A. The circular portion 27 has a higher brightness than the coloring portion 26.

FIG. 4 shows a state in which the contact lens 20 is worn. As shown, contact lens 2
0 is worn so as to substantially overlap with the iris 50, but is not necessarily worn exactly in the center of the pupil 60,
It is often worn slightly off. Since the coloring portion 26 of the contact lens 20 is formed to have a larger inner diameter than the portion corresponding to the pupil 60, the coloring portion 26 affects the field of view even when the contact lens 20 is mounted shifted from the center of the pupil. Never. The colored portion 26 of the contact lens 20 overlaps with the iris 50 but is colored differently from the iris.
Since the lightness of the contact lens 20 is higher than that of the colored portion 26,
There is no possibility of accidentally touching the cornea 70 or the sclera 80 when removing it, thereby damaging it. Although the wearing state has been described using the contact lens 20, the same applies to the contact lenses 10 and 10A.

The contact lens 20 not only exhibits the effects of the contact lenses 10 and 10A described above, but also has a different shape from the colored portion 16 of the contact lens 10A. , 20 at the same time, such as cleaning and sterilization, or managing them at the same location, it is possible to easily determine which of the right and left eyes is suitable. Moreover, the colored portions 16, 26 of the pair of contact lenses 10A, 20
Since the brightness of the circular portions 17 and 27 with respect to the coloring portion 16 is complementary to the colored portion 16, the impression given to a person as a synergistic effect is deepened, and a more artificial and intentional expression is possible. .

The contact lenses 10 and 10 as described above
A and 20 can be easily manufactured by a molding method. FIG. 5 is a cross-sectional view in which the contact lenses 10, 10A, and 20 are molded using a plastic mold 30 used for manufacturing. FIG. 6 shows the manufacturing process. As shown, the manufacturing process is roughly divided into a preparation process PROV, a contact lens molding process MOLD, and a subsequent process SUF. First, preparation process P
In the ROV, the production of a plastic mold 30 for molding, the production of a copper plate for pattern transfer, and the preparation of ink are performed.

In the manufacture of the plastic mold 30 in the preparation step PROV (step S100), the concave female mold 32 and the convex male mold 34 shown in FIG. 5 are manufactured by a mold manufacturing machine. This is performed by injecting a polyvinyl resin into a mold manufacturing apparatus having cavities of the female mold 32 and the male mold 34. As a result, a female mold 32 and a male mold 34 for molding are obtained. The surface of the female mold 32 is shaped to be the basis of the front curve of the completed contact lens, while the convex part of the male mold 34 is a uniform and smooth surface (base curve BC) because it is the contact part with the cornea. It has been. In order to further smooth the surfaces of the female mold 32 and the male mold 34, plasma processing or the like may be performed.

The preparation of the copper plate in the preparation step PROV (step S110) is performed by engraving a pattern with a score line on the surface of the copper plate. The same pattern as shown in FIG. 1 is engraved on the copper plate of the embodiment. As will be described later, ink is applied to this symbol and remains, and is used for transfer. This is a method similar to dry point in prints. The engraving of the engraved line on the copper plate
It may be performed manually or by an automated machine tool such as NC.

The circular portions 17 and 2 shown in FIGS.
When forming a colored portion where 7 exists, the colored portion 16,
A copper plate engraved with a design corresponding to 26, and a circular part 1
A copper plate engraved with a pattern corresponding to the pattern Nos. 7 and 27 may be prepared, and the steps of applying ink and transferring to a pad described below may be separately performed twice. Of course, multiple colors (at least two colors) can be simultaneously transferred and printed.

The remaining work of the preparation step PROV is a step of preparing ink (step S120). The ink uses Reactive Red 11 as a pigment, and is mixed with the same monomer as hema, which is the main material of the contact lenses 10, 10A and 20. Here, a red pigment is used, but if the pigments to be mixed are appropriately selected, the ink can be prepared in various colors. With the above steps (steps S100 to S120), preparation for manufacturing a contact lens is completed.

Next, a molding process MOLD for a contact lens
Will be described. The ink prepared in the preparation step PROV is applied to a copper plate (step S200), and thereafter, the ink on the surface of the copper plate is wiped off (step S210). As a result, the ink remains on the copper plate only in the concave portion of the score line. Next, a pad made of silicon is pressed against the surface of the copper plate (step S220). Since the silicon pad is highly elastic, it is deformed by pressing, and the ink inside the marking line is collected on the surface of the pad. Then, the silicon pad is pressed against the convex portion of the male mold 34 shown in FIG. 3 (step S230). As a result, the ink on the pad surface is transferred to the convex surface. In the case of forming a pattern as exemplified in FIGS. 2 and 3, ink is applied to a copper plate engraved with another pattern, the ink is collected on a pad, and transferred to the convex portion of the male mold 34 by pressing. do it. After the transfer of the ink in this manner, the male mold 34 is moved from 50 degrees to 60 degrees.
C and dry the ink (step S24).
0).

On the other hand, a monomer to be a contact lens is prepared (step S250), and molding is performed. In this embodiment, finally, the contact lenses 10, 10A,
Hydroxyethyl Mathacrylate as the material that becomes 20
(Commonly known as "hema"). After adjusting the components, an appropriate amount of this monomer is put into the concave portion of the female mold 32 (step S26).
0), in steps S200 to S240, the male mold 34 having the surface printed with ink is mounted and fixed as shown in FIG. 3 (step S270). Then, the fixed plastic mold 30 is placed in an oven and heated at 70 to 80 degrees (step 280). By heating, the monomer is polymerized and the rough shape of the contact lenses 10, 10A, 20 is molded. At this time, the ink of the pattern in which the dye is prepared is also polymerized and integrated with the contact lens. When the female mold 32 is removed after molding (step 290), the male mold 34 has the colored portions 16, 26 shown in FIGS.
(Furthermore, the contact lenses 10, 10A, 20 having the circular portions 17, 27) are obtained in a fixed state. This completes the contact lens molding step MOLD.

As the polymerizable monomer for forming a contact lens, 2-hydroxyethyl methacrylate 97
Parts by weight, ethylene glycol dimethacrylate 2 parts by weight, azobis (2,4-dimethylvaleronitrile) 0.
A mixture obtained by thoroughly mixing 3 parts by weight, degassing the mixture, and replacing with nitrogen can also be used. The mixture is filled into the female mold 32 and the male mold 34, and the mixture is put into a hot-air circulation type thermostat, and heated at 40 ° C. for 8 hours and at 80 ° C. for about 5 hours. The molding is completed.

[0037] The contact lens 1 thus completed in molding
For 0, 10A and 20, after removing the female mold 32,
Attach the male mold 34 to the lathe and contact lenses 10,1
0A, front curve (F) that determines the optical characteristics of 20
C) and cutting such as cutting of the peripheral portion, and polishing of the front and peripheral edges (step S300). A bevel is provided on the contact lens by polishing the peripheral portion or the like. The contact lenses 10, 10A, and 20 whose outer shapes are adjusted in this way are swollen in pure water, washed, and then immersed in physiological saline to absorb a predetermined amount of water (step S310). The contact lens is completed in this manner, but is further inspected in order to be treated as a product, and then placed in a prister container, a vial bin, or the like, and sterilized to obtain a finished product (step S320).

According to the above-described manufacturing method, the above-described excellent effects can be obtained by adding only a few manufacturing steps such as the production of ink and the transfer to the male mold 34 as compared with the usual one-sided molding / one-sided cutting method. Contact lenses 10, 10
A, 20 can be manufactured. Also, the colored portions 16, 26 formed on the contact lenses 10, 10A, 20
Are made of the same members as the contact lenses 10, 10A and 20. Therefore, although the light transmittance is different, the other optical characteristics such as the refractive index are the same, and it can be used as a contact lens for correcting a refractive error. Moreover, since the pigment used for coloring is mixed with the monomer, the colored portion is completely integrated with the contact lens, and even if the pigment component alone has a property of being deteriorated by tears or the like, it can be used. .

The embodiments of the present invention have been described above. However, the present invention is not limited to these embodiments, and can be implemented in various modes without departing from the gist of the present invention. Of course. For example, other patterns further provided on the coloring portion are not limited to a circle, and various shapes such as a star, a crescent, a clover, and a heart can be adopted. In addition, these figures may be formed by a method of coloring the front curve surface after the completion of the contact lens. If it is not colored, it is also possible to provide a pattern by forming an irregular reflection surface on the surface with a laser or the like. In addition, as a dye that forms a pattern, a dye that emits light of another wavelength when irradiated with light of a specific wavelength, such as a fluorescent material, can also be used.
The use of such a dye can produce an effect that the color of the contact lens changes depending on the environment and the lighting device. In addition, when a contact lens is lost, it can be easily found by using a light or the like that emits light of a specific wavelength. By using a combination of a black light and a dye that emits fluorescent light, it is possible to illuminate only a pupil in a specific color in a dark room, or to make a specific design emerge there.

Furthermore, in the above-described embodiment, the method of manufacturing the contact lenses 10, 10A, 20 using the single-sided molding and single-sided cutting is used. However, the casting method in which both surfaces of the contact lenses 10, 10A, 20 are completed by molding, or the like. A contact lens having discrete colored portions can be manufactured by a manufacturing method such as a spin casting method. As the polymerization of the monomer, a polymerization method other than the heat polymerization, for example, polymerization by light irradiation can be used. As a method of attaching a design to the colored portion, in the above embodiment, two copper plates were prepared, each of which was coated with ink, collected into a bad, and transferred to a mold, but was transferred from the two copper plates using one pad. The ink may be collected and transferred to the mold at one time.

[Brief description of the drawings]

FIG. 1 is a front view of a contact lens 10 according to an embodiment of the present invention.

FIG. 2 is a front view of a contact lens 10A according to a second embodiment.

FIG. 3 is a front view of a contact lens 20 according to a third embodiment.

FIG. 4 is an explanatory diagram showing a wearing state of the contact lens 20.

FIG. 5 is an explanatory sectional view of a plastic mold 30 for manufacturing the contact lenses 10, 10A, 20 by a molding method.

FIG. 6 is an explanatory view showing a manufacturing process of the contact lens.

[Explanation of symbols]

 10, 10A, 20 contact lens 12, 22 optical part 14, 24 bevel 16, 26 colored part 17, 27 circular part 30 plastic type 32 female type 34 male type 50 iris 60 pupil 70: Cornea 80: Sclera

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H006 BC05 BC06 BC07 4F204 AA21 AB12 AG03 AH74 EA03 EB01 EB23 EB25 EB28 EB30 EF01 EF23 EK24

Claims (12)

[Claims] 1. A contact lens having a ring-shaped colored portion around the periphery of the lens except for the center portion, wherein the colored portion has at least a color portion different from the iris color. 2. The contact lens according to claim 1, wherein the colored portion is annular. 3. The contact lens according to claim 1, wherein the colored portion has a size at least partially overlapping an iris of a wearer. 4. The contact lens according to claim 1, wherein the coloring portion is provided at a position corresponding to the outside of the iris of the wearer, and has a color portion different from the sclera color. 5. The contact lens according to claim 1, wherein the coloring portion has a plurality of coloring portions that can be distinguished from each other. 6. The contact lens according to claim 1, wherein the colored portion has an asymmetric shape with respect to the outer shape of the contact lens. 7. The contact lens according to claim 1, wherein the colored portion includes a region having a brightness equal to or less than a first predetermined value and a region having a second predetermined value or higher that is higher than the first predetermined value. 8. A contact lens set comprising at least two contact lenses, wherein a colored portion different from the color of the material of the lens is annularly arranged on the periphery of the lens, and the color of the colored portion is provided. A contact lens set in which at least one of the shape, the pattern, and the pattern are different in the contact lens set. 9. A method for manufacturing a contact lens, comprising mixing a predetermined dye with a monomer which is the same as or different from the material of the contact lens to manufacture an ink, and disposing the ink in an annular shape having a predetermined diameter or more. A method of manufacturing a contact lens, comprising: injecting the ink into the concave portion, collecting the ink in the concave portion with a pad, transferring the ink to a contact lens mold, and molding at least one surface of the contact lens with the transferred mold. 10. The method of manufacturing a contact lens according to claim 9, wherein the first ink is injected into first annular concave portions having a predetermined diameter or more. The sample is collected by a pad and transferred to a contact lens mold, and a second ink having a shape different from that of the second recess is obtained.
And the ink in the second concave portion is collected by a pad, transferred to a contact lens mold, and the transferred mold is used to mold at least one surface of the contact lens. Production method. 11. The method of manufacturing a contact lens according to claim 10, wherein collecting the ink from the first concave portion and collecting the ink from the second concave portion are performed by the single pad.
A method for manufacturing a contact lens, in which the ink is transferred to the mold at one time. 12. The method of manufacturing a contact lens according to claim 10, wherein the ink collected from the first concave portion is transferred to one of the contact lens molds using a pad, and collected from the second concave portion. A method for manufacturing a contact lens, wherein the transferred ink is transferred to the other of the molds using a pad, and both sides of the contact lens are molded using the transferred mold.