KR102262016B1 - Photochromic Color Contact Lens and Method thereof - Google Patents

Abstract

The present invention relates to a photochromic color contact lens and a manufacturing method thereof, and more particularly, to a photochromic color contact lens integrally formed through polymerization of a photochromic part, a colored pattern part, and a lens body part, and a manufacturing method thereof. According to the photochromic color contact lens and the manufacturing method thereof of the present invention, a photochromic material is included at a set position of the lens to effectively block UV rays and maximize visual effects as well, thereby simultaneously ensuring vision correction, eyesight protection, and aesthetic effects.

Description

Photochromic Color Contact Lens and Manufacturing Method thereof {Photochromic Color Contact Lens and Method thereof}

The present invention relates to a photochromic color contact lens and a method for manufacturing the same. More specifically, the photochromic color contact lens and its manufacturing method include a photochromic material in a set area to correct eyesight and prevent deterioration of eyesight due to ultraviolet rays The invention relates to a manufacturing method.

A colored contact lens refers to a contact lens in which a pigment that supports to change all or part of the color of the wearer's iris to a selected color is applied to a selected specific area. Such color contact lenses are to change the color of the iris by coloring the contact lenses for correcting eyesight according to the shape of the iris.

However, in the case of existing colored contact lenses, due to defects in the process for applying the pigment to the iris colored area or the pigment exposed as the outer skin, it continuously rubs with the inner surface of the eyelid, causing damage to the inner surface of the eyelid and conjunctivitis. It has been pointed out that the lens cannot be used for a long time because this occurs or waste materials such as proteins and lipids are adsorbed to the colored part.

In addition, when the eyeball is frequently exposed to external sunlight, it is known that it causes eye diseases such as vision loss or cataracts, as well as blindness. known to be dependent. Accordingly, the number of people who wear sunglasses to protect their eyes from external sunlight by reducing the amount of light with sunglasses during outdoor activities is also increasing. However, in the case of sunglasses such as glasses, inconveniences such as wearing sunglasses due to moving indoors and outdoors have been continuously raised, and it is necessary to separately prepare color sunglasses lenses for vision correction depending on whether the lenses for vision correction are worn or not. Discomfort has been continuously raised.

In order to respond to this problem, products using photochromic materials are being prepared for the pupil part of lenses, but the demand for photochromic color contact lenses that can simultaneously realize photochromic and user needs at the same time continues to expand the demand. situation that has been

Republic of Korea Patent Publication No. 10-2005-0085481 Republic of Korea Patent Publication No. 10-2013-0054262 Republic of Korea Patent No. 10-1752862

The technical problem to be achieved by the present invention is to include a photochromic material at a set position (for example, a position corresponding to the pupil of the eye) of a lens worn in the user's eye, so as to effectively block UV rays, and at the same time to protect the iris. At the set position of the corresponding lens, it is to provide a photochromic color contact lens that can simultaneously secure vision correction, vision protection and aesthetic realization by maximizing the visual effect through the implementation of various types of colors and patterns.

In addition, the present invention minimizes the adsorption of waste products such as proteins and lipids even when worn for a long period of time, and at the same time prevents the pigment used for color implementation from being arbitrarily exposed to the outside. It is also an object to provide safe photochromic color contact lenses that do not

In order to achieve the above object of the present invention, a photochromic color contact lens according to an embodiment of the present invention is formed through dye polymerization, and isomers having different absorption spectra because the bonding state of chemical substances is changed by light irradiation. a photochromic unit performing a light color change function using a reversibly generated phenomenon; a coloring pattern unit formed by printing a color pattern set on a lower surface of the photochromic unit; and a lens body in which the photochromic part is closely attached to the upper surface and the lens body in direct contact with the cornea of the eye. This can be achieved through the provision of a photochromic color contact lens comprising a.

In addition, the photochromic part is formed in advance through dye polymerization, and then is additionally polymerized with the lens body part, wherein the dye polymerization is a mixture of a monomer, an initiator, a modifier, a solvent and a viscosity maintaining agent, and a photochromic dye. Thereafter, it is possible to achieve the object of the present invention described above through the provision of a photochromic color contact lens, characterized in that it proceeds by stirring within a set temperature and time condition.

In this case, the solvent is ethyl cellosolve, 2-mercaptoethanol, cyclopentanone, ethyl lactate 45~ It can be used together as 80% by weight alone or by mixing several solvents in appropriate proportions.

In addition, the dye polymerization, the monomer 2-hydroxyethyl methacrylate 38 to 55% by weight. Methyl methacrylate 1 to 10% by weight, methacrylic acid 1 to 10% by weight, styrene 1 to 10% by weight, benzoyl peroxide 1 to 15% by weight as polymerization initiator, glycidyl methacrylate 2 to 5 as viscosity maintaining agent % by weight, 45 to 80% by weight of ethyl cellosolve as a solvent, 10 to 32% by weight of butyl acetate and 1 to 3% by weight of a photochromic dye or 1 to 5% by weight of a pigment are mixed and stirred at room temperature to form polymerization It is also possible to achieve the above object of the present invention through the provision of a photochromic color contact lens.

In addition, in order to achieve the object of the present invention, the colored pattern part is polymerized in advance through a hydroxyalkyl (meth) acrylate polymer and a color pattern set through pattern printing is formed on the front and / or back surfaces, The photochromic part has a corresponding receiving groove formed on the rear side to accommodate the colored pattern part inside, so that the colored pattern part is accommodated therein, and it is polymerized with the lens body part to form a lens. It is also contemplated to provide photochromic colored contact lenses that feature.

In addition, in the colored pattern part according to the present invention, a pigment is applied to the lower surfaces of both ends spaced apart from the center of the pupil by a predetermined distance so as not to obstruct the view from the center, and the lens body part guides the position of the edge of the photochromic part. At the same time, the present invention is provided as a photochromic color contact lens comprising a guide part that is closely polymerized, and a second colored pattern part coated with a pigment on the upper surface by a length set outward based on the guide part. is possible to achieve the purpose of

In addition, the object of the present invention can be achieved through the provision of the photochromic color contact lens, which further comprises an antifouling coating layer formed on the surface of the photochromic color contact lens.

Additionally, the method for manufacturing a photochromic color contact lens may include: (a) forming a photochromic part through dye polymerization; (b) forming a lens body part for manufacturing a hydrogel contact lens that is the lens body part; (c) a lens forming step of manufacturing the photochromic color contact lens by combining the steps (a) and (b); or the step (c) The present invention to be passed through the photochromic color contact lens manufacturing method, characterized in that it further comprises; a step of forming the colored pattern part by separately polymerizing and forming the colored pattern part before printing the set color pattern to form the colored pattern part; purpose can be achieved.

In addition, the method for manufacturing a photochromic color contact lens further comprises the step of inserting and accommodating the colored pattern part into the rear surface of the photochromic part prepared in step (a). can also be used.

In addition, the method for manufacturing a photochromic color contact lens further comprises, after step (c), forming an additional antifouling coating layer on the polymerized photochromic color contact lens, wherein the forming of the antifouling coating layer includes the polymerization is completed. Putting photochromic color contact lenses in a solvent containing EGDMA and CHP and storing them at room temperature for 5 minutes to produce contact lenses of the coating pretreatment step; generating a contact lens of the coating step by storing the zwitterion hydrogel, iron (II) chloride, and ascorbic acid in a solution added to the contact lens of the coating pretreatment step at room temperature for 15 minutes; Washing the contact lenses after the coating step is completed with 1% sodium dodecyl sulfate solution for 5 minutes and then immersing them in distilled water for 8 hours; It may also be used as a method for manufacturing a photochromic color contact lens comprising; manufacturing a photochromic color contact lens coated with a zwitterion hydrogel.

The photochromic color contact lens according to an embodiment of the present invention can prevent damage to the pupil, retina, etc. due to ultraviolet rays, etc., and at the same time implement an aesthetic feeling through various color patterns and shapes implemented in the set part of the lens. have. In addition, by minimizing the adhesion of foreign substances such as proteins and lipids due to wearing the lens, it is possible to wear the lens stably for a long time.

1 is an exploded perspective view showing a photochromic color contact lens according to an embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in several different forms, and thus is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is "connected (connected, contacted, coupled)" with another part, it is not only "directly connected" *, but also "indirectly connected" with another member in the middle. Including "connected" cases. In addition, when a part "includes" a certain component, this means that other components may be further provided without excluding other components unless otherwise stated.

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

1 is an exploded perspective view showing a photochromic color contact lens 100 according to an embodiment of the present invention.

As shown in FIG. 1 , the photochromic color contact lens 100 according to the present invention includes a photochromic unit 110 , a coloring pattern unit 120 , and a lens body unit 130 .

The photochromic unit 110 according to the present invention is formed in the front center of the photochromic color contact lens 100 (for example, corresponding to the pupil region when the lens 100 is worn), Light) refers to a region capable of realizing light discoloration using a phenomenon in which isomers with different absorption spectra are reversibly generated by changing the bonding state of chemical substances by irradiation. To this end, the photochromic unit 110 may have a convex front surface and a flat rear surface (eg, a convex lens shape).

The photochromic part 110 may be formed by polymerizing a material exhibiting photochromic properties with an organic compound. For this purpose, the photochromic part 110 according to the present invention may be formed by dye polymerization (preliminarily polymerizing a dye containing a photochromic dye and a compound capable of forming a lens such as HEMA) before the lens 100 manufacturing step. have.

To this end, the photochromic unit 110 may be formed by mixing a monomer, an initiator, a modifier, a solvent and a viscosity maintaining agent, a photochromic dye or a pigment, and then performing dye polymerization with stirring within a set temperature and time condition.

As a specific example, the dye polymerization of the photochromic unit 110 according to the present invention is 38 to 55 wt% of the monomer 2-hydroxyethyl methacrylate. Methyl methacrylate 1-10 wt%, methacrylic acid 1-10 wt%, styrene 1-10 wt%, polymerization initiator benzoyl peroxide 1-15 wt%, viscosity maintaining agent glycidyl methacrylate 2-5 wt% % by weight, 45 to 80% by weight of ethyl cellosolve as a solvent, 10 to 32% by weight of butyl acetate, and 1 to 3% by weight of a photochromic dye (or 1 to 5% by weight of a pigment) are mixed and stirred at room temperature to form polymerization have.

In this case, 45 to 80% by weight of the solvent, ethyl cellosolve, 2-mercaptoethanol, cyclopentanone, and ethyl lactate, alone or several solvents can be used together by mixing in an appropriate ratio.

In addition, the dye polymerization of the photochromic part 110 according to another embodiment according to the present invention, 2-hydroxymethacrylate (HEMA) 60 to 95 wt%, N-vinylpyrrolidone for hydrophilicity 3 to 38 wt. %, 0.1 to 2.0 wt% of ethylene glycol dimethacrylate as a crosslinking agent, 0.01 to 0.50 wt% of azobisisobutyronitrile (AIBN, Azobisisobutyronitrile) as an initiator After mixing 0.01 to 0.50 wt%, the mixture was stirred at room temperature for 1 hour, and the stirred was photochromic According to the shape and shape of the part 110, it may be polymerized by injecting it into a contact lens mold prepared in advance.

However, the composition and/or composition ratio of the above-described photochromic unit 110 may utilize components and/or composition ratios known through prior art such as existing patents.

The dye polymerization of the photochromic unit 110 according to the present invention may be carried out for a set time (1 to 6 hours) at a set temperature (room temperature to 130° C.) using a drying oven.

In addition, the photochromic unit 110 according to another embodiment of the present invention is formed by coating the surface of the above-mentioned compound on a set area such as the central front of the integrally formed photochromic color contact lens 100 (eg, a pupil-corresponding area), and then UV rays. It can also be formed through (UV) curing.

The coloring pattern part 120 is formed in a flat disk shape having the same diameter and shape as the photochromic part 110 , and may be attached to the rear surface of the photochromic part 110 (as shown in FIG. 1 , photochromic part 110 ). attached to the part 110 and the lens body part 130). Through this, the colored pattern unit 120 according to the present invention is formed in various ways through the various color patterns (combination of shapes, shapes and/or colors) described below after polymerization based on the compound as described below. In this way, it is positioned between the photochromic unit 110 and the lens body 130 prepared in one form using the colored pattern unit 120 prepared as individual parts (parts) to reduce the production cost and at the same time The advantage of being able to manufacture the photochromic color contact lenses 100 of various color patterns can be secured (that is, the photochromic unit 110 and the lens body 130 are produced in a certain shape and shape to reduce the production cost. While saving, it is possible to implement a color pattern that meets the various needs of customers through the separately prepared coloring pattern unit 120).

The colored pattern part 120 according to the present invention may be prepared (polymerized) from a hydroxyalkyl (meth)acrylate polymer such as a HEMA-based polymer. More specifically, the colored pattern portion 120 according to the present invention may be formed by mixing one or more C 6 or more alkyl (meth) acrylate comonomers in a copolymer of hydroxyalkyl (meth) acrylate, through which Products such as hydrogel contact lenses made from copolymers can be formed thinner while improving strength without an accompanying increase in brittleness under stress conditions (ie, daily use conditions).

After polymerization, the front (part closely attached to the rear surface of the photochromic part 110) and/or the rear surface of the colored pattern part 120 (part closely attached to the set front surface of the lens body 130 to be described later) It is possible to print the color pattern (shape, shape, color) set in . (a color pattern is realized through application of a pigment, for this, a method such as pad printing or ink printing can be utilized).

The pigment applied to the colored pattern part 120 according to the present invention, a pearlescent pigment using mica, may be made by coating titanium dioxide or other metal oxide having a high refractive index on the plate-shaped mica surface. . In this case, pearl luster occurs due to the light interference effect and reflection in the titanium dioxide layer coated on the mica surface, and through this, the color contact lens 100 according to an embodiment of the present invention. It becomes possible to express pearl luster on the iris of the wearer.

The processing process of mica used for the pigment for providing pearlescent gloss according to an embodiment of the present invention is as follows.

In order to use mica of a certain size (mica purification) as raw materials such as muscovite, use a sieve of 100 mesh and 150 mesh standard (pores) to adjust the particle size to 106 μm to 150 μm (mica purification). step).

After that, mix Titanium Sulfate (Ti(SO4)2) and distilled water in a certain ratio and stir enough for a set time, that is, set the mixing ratio of Titanium Sulfate and distilled water to have a certain ratio and concentration to proceed with the process of preparing a titanium solution. (Titanium solution preparation step).

After that, 2 g of mica and 200 ml of distilled water are put into the reactor and stirred while raising the temperature to make a mica slurry solution, and when the mica slurry solution reaches the reaction temperature, the titanium solution prepared in advance is added, and the temperature is maintained constant and the reaction time is determined After stirring for a while, it is subjected to a process (filtration step) of filtering through a filter after stirring.

After that, it is washed again with 1000 ml of distilled water, dried at 100° C. for more than 12 hours, and then the dried powder is calcined for a certain period of time in a furnace (tiO2 coated mica production step), and finally for pearlescent composition The pigment can be prepared.

A pearlescent pigment using mica that can be applied to the colored pattern part 120 that can be used in an embodiment of the present invention is coated with titanium dioxide or other metal oxide having a high refractive index on the plate-shaped mica surface. can be made by In this case, pearl luster occurs due to the light interference effect and reflection in the titanium dioxide layer coated on the mica surface, and through this, the contact lens 100 according to an embodiment of the present invention is It is possible to express pearl luster on the wearer's iris region.

However, the above-described pigment for providing pearlescent (pigment for application to the coloring pattern unit 120) manufacturing step may be prepared through various raw materials and manufacturing processes in addition to one embodiment.

In addition, the pigment applied to the colored pattern part 120 according to the present invention proceeds from the center to the end (spaced apart from the center) of the colored pattern part 120 (or in the opposite direction) through the ratio adjustment of the above-described composition. , or atypically) may be formed so as to be relatively lighter or less bright than the pigmentation of the applied pigment. Through this, as the wearer's pupil moves to the outside, a pattern such as a set color, such as pearlescent, becomes darker or softer, can be implemented.

Pattern printing for pigment application by polymerizing the colored pattern part 120 as a separate member to be distinguished from the photochromic part 110 and the lens body part 130 through a separate process and then printing the color pattern to form it. Since printing defects can be confirmed more quickly in the process or polymerization process, etc., it can also support the reduction of the defect rate in the manufacturing process of the photochromic color contact lens 100 and the securing of economic efficiency by reducing the waste of materials and products due to defects. there will be

However, unlike this, the rear surface of the photochromic part 110 according to the present invention is formed relatively larger than the cross-sectional size of the front surface of the colored pattern part 120, and a separate "accommodating groove" (not shown, At the same time, a “border” formed to have a height corresponding to the height of the color pattern unit 120 is formed on the edge of the photochromic unit 110 , and the color pattern unit is formed inside the photochromic unit 110 . 120 can be completely inserted and accommodated without being exposed to the outside (that is, as the colored pattern part 120 is inserted from the rear direction of the photochromic part 110, the photochromic part 110 and the lens body part ( 130), the rim part is in direct contact with each other. Through this, the pigment applied to the front surface of the colored pattern part 120 does not flow out or flow out through the surface of the lens 100 even when the lens 100 is worn for a long period of time. In addition, the rear surface of the colored pattern part 120 is formed to be attached to the set front surface of the lens body part 130 to be described later, and the pigment applied to the rear surface of the colored pattern part 120 is also applied to the lens 100 even when used for a long period of time. It is possible to effectively prevent leakage to the outside.

Alternatively, a color pattern set through direct printing on the back surface of the polymerized photochromic unit 110 may be formed (a polymerization process step of the separately divided colored pattern unit 120 may be omitted).

In addition, the colored pattern unit 120 according to the present invention, unlike the above-described embodiment, has a set front portion of the lens body 130 to be described later (a pupil portion and/or a pupil portion to which the photochromic portion 110 is attached). A separate “coloring pattern part receiving groove” formed in the “coloring pattern part receiving groove” is formed to match the shape, shape, and thickness of the colored pattern part 120, and the colored pattern part is formed in the “colored pattern part receiving groove”. After the 120 is inserted and accommodated, the lens 100 according to the present invention may be manufactured through a polymerization process.

The lens body 130 has the lower surface in direct contact with the cornea of the eye and the color pattern unit 120 is closely attached to the upper surface (or photochromic when the color pattern unit 120 is inserted and accommodated in the photochromic unit 110 ) Refers to a lens base to which the part 110 is closely attached.

The lens body 130 may be made of a material having elasticity that can form various base covers that can correspond to various eye shapes of the wearer, that is, a hydroxyalkyl (meth)acrylate polymer such as a HEMA-based polymer. . In addition, the lens body 130 may be formed by mixing one or more alkyl (meth) acrylate comonomers having 6 or more carbon atoms in a copolymer of hydroxyalkyl (meth)acrylate (eg, 2-hydroxyethyl methacrylate). Through this, strength is improved without accompanying increase in brittleness under low stress conditions (that is, conditions of daily use), while products such as hydrogel contact lenses made from copolymers are made thinner and softer according to the shape of the eyeball. A curved shape can be maintained.

The lens body 130 according to the present invention may additionally include a guide part 131 .

The guide part 131 refers to a ring-shaped ring formed to have a constant thickness based on a horizontal plane, and is seated on the set upper surface of the lens body 130, and a colored pattern part that is superimposed on the upper part. 120, or the photochromic unit 110) and the lens body unit 130 when integrally closely attached to perform a guide role, such as positioning.

That is, the guide part 131 according to the present invention serves as a physical reference line for designating the positions of the photochromic part 110 and the colored pattern part 120 to be positioned on the lens body part 130 . In addition, the guide part 131 is seated on the upper surface of the lens body part 130 so that the photochromic part 110 and the colored pattern part 120, which are in close contact from the top, do not arbitrarily deviate or drop out from the positions set in the lens manufacturing process, etc. The function of temporarily fixing the position (which may be particularly useful before the polymerization process or in the polymerization process step, etc.) is also performed by being attached to or in close contact with the lower surface of the end of the photochromic part 110 (which may be the "border" described above). be able to

To this end, the outer end of the lower surface of the photochromic part 110 and/or the colored pattern part 120 to be positioned on the upper surface of the guide part 131 may be formed to have a thinner thickness than the cross-section of the center (inside). Alternatively, the photochromic part 110 and/or the color pattern part 120 is attached to the upper surface of the lens body 130 at a position spaced apart from the outside by a set interval in the inward direction of the guide part 150 formed to protrude to the upper surface. A "guide accommodating groove" corresponding to the guide part 131 may be separately formed on the lower surface to accommodate all or part of it inside (for example, a protrusion and a groove shape capable of accommodating the protrusion).

In addition, the guide part 131 may include a second colored pattern part (upper surface of the lens body part 130 ) in which a pigment is applied to the upper surface by a length set to the outside.

In addition, the guide part 131 may also be formed of a HEMA-based polymer including a pearlescent pigment using mica as described above or a pigment for implementing other color patterns therein.

In this case, the color pattern unit 120 and the guide unit 131 are visually distinguished more clearly by different colors and/or color patterns because the composition ratio is the same as the pigment applied to the color pattern unit 120 or the composition ratio is different. It may be formed as such.

However, unlike the above, the photochromic color contact lens 100 according to the present invention provides additional aesthetic feeling by separately printing (pad printing, etc.) a separate color pattern on the front and/or back after polymerization of the lens 100. and product improvement.

In addition, in another embodiment of the lens 100 according to the present invention, the colored pattern part 120 can be inserted and accommodated in the set front surface of the lens body part 130 that is in contact with the photochromic part 110 and is polymerized and fastened (coupled). A separate “coloring pattern receiving groove” that can be formed may be formed. The “coloring pattern part receiving groove” is inserted into the inside of the lens body 130 so as to correspond to the shape, shape, size and thickness of the colored pattern part 120 described above, and the coloring pattern part is formed in the groove formed in this way. Since the 120 is inserted and received, the colored pattern part 120 may not be exposed or protruded from the front of the lens body 130 . Thereafter, through a polymerization process, the lens body unit 130 accommodating the photochromic unit 110 and the colored pattern unit 120 in the set internal space is attached.

In addition, by forming an additional “anti-fouling coating layer” on the photochromic color contact lens 100 that has been polymerized, the adhesion of proteins and/or lipids to the surface of the lens 100 is minimized, so that the lens 100 can be worn stably for a long time. you can also make it

Hereinafter, the characteristics of the manufacturing process of the photochromic color contact lens 100 according to the present invention will be described.

In the manufacturing process according to the present invention, a dye polymer is prepared in order to prevent discoloration and discoloration of the photochromic color contact lens 100 and to improve productivity by stably combining the photochromic dye and the pigment, and to shorten the production time of the dye polymer. characterized by manufacturing.

More specifically, (a) a photochromic part forming step of forming the photochromic part 110 through dye polymerization; (b) forming a lens body part for manufacturing a hydrogel contact lens that is a lens body part 130; (c) combining the steps (a) and (b) may proceed to the lens forming step of manufacturing the photochromic color contact lens 100 .

In addition, before the step (c), a separate colored pattern part 120 is formed, that is, a color pattern set on the body formed through HEMA polymerization, etc. is printed to form the colored pattern part 120 (coloring pattern part forming step) ) may be additionally included.

In addition, the coloring pattern part proceeds before step (a), and then after inserting and receiving the coloring pattern part 120 into the rear surface of the photochromic part 110 prepared in step (a), it can proceed to step (c). have.

In addition, after the step (c), the step (step d, antifouling coating layer forming step) of additionally forming an “antifouling coating layer” on the photochromic color contact lens 100 formed by polymerization may be further included.

The “antifouling coating layer” is a pre-coating step by putting the polymerized photochromic contact lenses (100, HEMA, silicone-based photochromic contact lenses) according to the present invention into a solvent containing EGDMA and CHP and storing them at room temperature for 5 minutes. generating a contact lens of (step d-1); The contact lens of the coating pretreatment step was stored at room temperature for 15 minutes in a solution containing zwitterion hydrogel, iron (II) chloride, and ascorbic acid added to the contact lens of the coating pretreatment step to produce the contact lens (B) of the coating step (step d-2) ; Washing the contact lenses on which the coating step is completed with 1% sodium dodecyl sulfate solution for 5 minutes and then immersing them in distilled water for 8 hours (step d-3); It may be formed through a step (step d-4) of preparing a photochromic color contact lens 100 coated with a zwitterion hydrogel.

In addition, in step (a), within a range corresponding to the size of the pupil, a dye polymer is preformed, and after step (c), the set surface (set parts such as front and back parts) of the contact lens 100 is colored ( Step e, an additional pattern forming step) may be further included.

The above description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

100: photochromic color contact lenses
110: photochromic part
120: color pattern part
130: lens body
131: guide unit

Claims (10)

a photochromic unit that is formed through dye polymerization, and performs a light color change function using a phenomenon in which a chemical compound is changed by irradiation with light and thus isomers having different absorption spectra are reversibly generated;
a coloring pattern unit formed by printing a color pattern set on a lower surface of the photochromic unit; and
The upper surface of the photochromic part is closely attached, and the lower surface of the lens body part is in direct contact with the cornea of the eye.
The colored pattern part,
Characterized in that it is polymerized in advance through a hydroxyalkyl (meth) acrylate polymer and formed on the front side and/or back side with a color pattern set through pattern printing,
The photochromic part,
A corresponding receiving groove is formed on the rear surface to accommodate the colored pattern part inside, and the colored pattern part is accommodated therein, and is polymerized with the lens body part to form a lens,
The colored pattern part,
Pigment is applied to the lower surfaces of both ends spaced apart from the center of the pupil by a certain distance so as not to obstruct the view from the center,
The lens body part,
It includes a guide part that guides the position of the edge of the photochromic part and at the same time is closely polymerized,
A photochromic color contact lens comprising a second colored pattern part coated with a pigment on the upper surface by a length set outward based on the guide part.
The method according to claim 1,
The photochromic part,
After being formed in advance through dye polymerization, characterized in that it is additionally polymerized with the lens body,
The dye polymerization is
A photochromic color contact lens, characterized in that after mixing a monomer, an initiator, a modifier, a solvent, a viscosity maintaining agent, and a photochromic dye, the mixture is stirred within a set temperature and time condition.
The method according to claim 1,
The dye polymerization is
38-55 wt% of monomer 2-hydroxyethyl methacrylate. Methyl methacrylate 1-10 wt%, methacrylic acid 1-10 wt%, styrene 1-10 wt%, polymerization initiator benzoyl peroxide 1-15 wt%, viscosity maintaining agent glycidyl methacrylate 2-5 wt% % by weight, 45 to 80% by weight of ethyl cellosolve as a solvent, 10 to 32% by weight of butyl acetate and 1 to 3% by weight of a photochromic dye or 1 to 5% by weight of a pigment are mixed and stirred at room temperature to form polymerization Photochromic colored contact lenses.
delete delete The method according to claim 1,
The photochromic color contact lenses,
A photochromic color contact lens further comprising an antifouling coating layer formed on the surface.
In the manufacturing method for manufacturing the photochromic color contact lens of any one of claims 1, 2, 3 and 6,
The photochromic color contact lens manufacturing method,
(a) forming a photochromic part through dye polymerization to form the photochromic part;
(b) forming a lens body part for manufacturing a hydrogel contact lens that is the lens body part;
(c) forming a lens by combining the photochromic part and the lens body formed through the steps (a) and (b) to manufacture the photochromic color contact lens; and
After step (c), comprising the step of forming an additional antifouling coating layer on the photochromic color contact lens formed by polymerization,
The antifouling coating layer forming step,
Putting the polymerized photochromic contact lenses in a solvent containing EGDMA and CHP and storing them at room temperature for 5 minutes to produce a contact lens in the pre-coating step;
generating a contact lens of the coating step by storing the zwitterion hydrogel, iron (II) chloride, and ascorbic acid in a solution added to the contact lens of the coating pretreatment step at room temperature for 15 minutes;
Washing the contact lenses after the coating step is completed with 1% sodium dodecyl sulfate solution for 5 minutes and then immersing them in distilled water for 8 hours;
A method of manufacturing a photochromic color contact lens comprising the; manufacturing a photochromic color contact lens coated with a zwitterion hydrogel.
8. The method of claim 7,
The photochromic color contact lens manufacturing method,
Prior to step (c), an independent colored pattern part is formed by separately polymerizing, and then the color pattern set in the polymerized colored pattern part is printed to form the colored pattern part in which the color pattern is realized; more A method for manufacturing photochromic color contact lenses, comprising:
9. The method of claim 8,
The photochromic color contact lens manufacturing method,
The method of manufacturing a photochromic color contact lens according to claim (a), further comprising the step of inserting and accommodating the colored pattern part into the rear surface of the photochromic part prepared in step (a). delete

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