CN117008356A

CN117008356A - Contact lens with pattern

Info

Publication number: CN117008356A
Application number: CN202311047917.2A
Authority: CN
Inventors: 张汉宜; 丁伟家
Original assignee: Pegavision Corp
Current assignee: Pegavision Corp
Priority date: 2018-10-19
Filing date: 2018-10-19
Publication date: 2023-11-07
Also published as: CN111077680A

Abstract

The application discloses a contact lens with patterns, which comprises a lens body, a pattern layer and a protective layer. The lens body is provided with an inner surface and an outer surface which are opposite, wherein the inner surface is a concave surface and the outer surface is a convex surface. The pattern layer is arranged in the lens body and is close to the outer surface of the lens body, and the protective layer is arranged in the lens body and is positioned between the outer surface of the lens body and the pattern layer so as to isolate the pattern layer from the outside. The pattern layer and the inner surface of the lens body have a vertical distance between 5 micrometers and 100 micrometers, the maximum outer diameter of the protective layer is not less than 6 millimeters, and the maximum outer diameter of the protective layer meets the following conditions: w2+ # W2×0.1% < W1< W2+ # W2×20%; wherein W1 represents the maximum outer diameter of the protective layer, and W2 represents the maximum outer diameter of the pattern layer. Therefore, the wearer's eyes can be prevented from directly contacting the pattern layer, and the pattern layer can stably exhibit a predetermined dressing effect in the lens body.

Description

Contact lens with pattern

The application relates to a divisional application, the application number of the main application is 201811219704.2, the application date is 2018, 10 month and 19 days, and the name is a contact lens with patterns.

Technical Field

The present application relates to contact lenses, and more particularly to patterned contact lenses.

Background

After the information society comes, the frequent use of 3C products such as smart phones, computers and the like results in not only increasing the rate of suffering myopia of people in China, but also the annual decline trend of myopia age groups. Contact lens wear is a good choice in view of aesthetics and ease of use.

In recent years, the development of contact lenses has been that, from the original basic function of correcting vision, a decorative function is further added, i.e. a specific color, a specific pattern or a combination thereof is arranged in the lens, so as to achieve the requirement of beautifying eyes. Many people today have the habit of wearing color contact lenses for a long period of time even without myopia, however, the colorants used to make color contact lenses are more or less damaging to the eyes of the wearer.

In addition, the color contact lens is often repeatedly bent during wearing or cleaning, which causes deformation and unevenness of the pattern profile formed by the coloring layer coated in the lens body, and the coloring material in the coloring layer falls off when the color contact lens is more serious, thereby causing damage to eyes.

Disclosure of Invention

The application aims to solve the technical problem of providing a contact lens with patterns aiming at the defects of the prior art so as to consider the beauty and the safety of a wearer.

In order to solve the above-mentioned technical problems, one of the technical solutions adopted in the present application is to provide a patterned contact lens, which includes a lens body, a pattern layer and a protective layer. The lens body has an inner surface and an outer surface opposite to the inner surface, the inner surface is a concave surface and the outer surface is a convex surface. The pattern layer is arranged in the lens body and is close to the outer surface, and a vertical distance is arranged between the pattern layer and the inner surface, and the vertical distance is between 5 micrometers and 100 micrometers. The protective layer is arranged in the lens body and is positioned between the pattern layer and the outer surface so as to isolate the pattern layer from the outside. In addition, the maximum outer diameter of the protective layer is not less than 6 mm; the maximum outer diameter of the protective layer is W1, and the maximum outer diameter of the pattern layer is W2, which satisfies the following condition W2+W2×0.1% < W1< W2+W2×20%.

In an embodiment of the present application, the pattern layer has a first gentle slope structure with a maximum tangential angle between 10 degrees and 80 degrees.

In an embodiment of the application, the protection layer has a second gentle slope structure with a maximum tangential angle between 5 degrees and 45 degrees.

In an embodiment of the present application, the pattern layer includes a plurality of color layers having different colors, and the plurality of color layers are separated from each other to form a predetermined pattern.

In an embodiment of the present application, the pattern layer includes a plurality of color layers with different colors, and the plurality of color layers are stacked to form a predetermined pattern.

In an embodiment of the present application, the plurality of color layers are a first color layer and a second color layer, respectively, the first color layer has a first color mixing region, and a portion of the second color layer is stacked on the first color mixing region.

In an embodiment of the present application, the plurality of color layers are a first color layer, a second color layer and a third color layer, wherein the first color layer has a first color mixing region and a second color mixing region adjacent to each other, a portion of the second color layer is stacked on the first color mixing region, and a portion of the third color layer is stacked on the second color mixing region.

In an embodiment of the application, the lens body has a central area and a peripheral area surrounding the central area, and the pattern layer and the protection layer are disposed on the peripheral area.

In an embodiment of the present application, the projected area of the central area is 15% to 25% of the total area of the lens body, and the projected area of the peripheral area is 75% to 85% of the total area of the lens body.

In an embodiment of the present application, the protective layer includes a film-forming polymer and a hydrophilic polymer, and the content of the film-forming polymer is between 15% and 50% and the content of the hydrophilic polymer is between 5% and 40% based on the total weight of the protective layer.

One of the advantages of the present application is that the patterned contact lens provided by the present application is capable of providing a contact lens having a pattern by including the technical features of "a pattern layer disposed in a lens body and adjacent to an outer surface thereof, a protective layer disposed in the lens body and located between the outer surface thereof and the pattern layer" and "a vertical distance between the pattern layer and an inner surface of the lens body of between 5 microns and 100 microns" and "a maximum outer diameter of the protective layer of not less than 6 mm" and the maximum outer diameter of the protective layer satisfying the following conditions: w2+ # W2×0.1% < W1< W2+ # W2×20%; wherein W1 represents the maximum outer diameter of the protective layer, W2 represents the maximum outer diameter of the pattern layer, so as to avoid the eyes of the wearer from directly contacting the pattern layer, and ensure that the pattern layer can stably display the preset dressing effect in the lens body, and meanwhile, the pattern contour can not be deformed due to the extrusion of the lens body, and the pattern pigment can not be exposed or even fall off to cause damage to the eyes of the wearer.

For a further understanding of the nature and the technical aspects of the present application, reference should be made to the following detailed description of the application and the accompanying drawings, which are provided for purposes of reference only and are not intended to limit the application.

Drawings

FIG. 1 is a schematic cross-sectional view of a patterned contact lens of the present application.

Fig. 2 is an enlarged schematic diagram of part II of fig. 1.

Fig. 3 is a schematic top view of a patterned contact lens of the present application.

Fig. 4 is another enlarged schematic view of part II of fig. 1, showing a first embodiment of the patterned layer in the patterned contact lens of the present application.

Fig. 5 is a further enlarged schematic view of section II of fig. 1, showing a second embodiment of the patterned layer in the patterned contact lens of the present application.

Fig. 6 is a further enlarged schematic view of section II of fig. 1, showing a third embodiment of the patterned layer in the patterned contact lens of the present application.

Fig. 7-10 are schematic views of a manufacturing process in a patterned contact lens of the present application.

Detailed Description

The following is a description of the embodiments of the present application disclosed herein with respect to "patterned contact lenses" and those skilled in the art will appreciate the advantages and effects of the present application from the disclosure herein. The application is capable of other and different embodiments and its several details are capable of modification and variation in various other respects and all without departing from the spirit of the present application. The drawings of the present application are merely schematic illustrations, and are not intended to be drawn to actual dimensions. The following embodiments will further illustrate the related art content of the present application in detail, but the disclosure is not intended to limit the scope of the present application.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are used primarily to distinguish one element from another element or signal from another signal. In addition, the term "or" as used herein shall include any one or combination of more of the associated listed items as the case may be.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. When a term is presented in the singular, the plural of that term is contemplated. Laboratory procedures used herein are well known and commonly used in the art, and the methods used for such procedures are also provided in general references.

All percentages mentioned herein are percentages by weight unless indicated otherwise. When a series of upper and lower ranges are provided, all combinations of the mentioned ranges are contemplated as if each combination were explicitly listed.

Referring to fig. 1 to 3, an embodiment of the present application provides a patterned contact lens L, which has a sandwich structure and includes a lens body 1, a patterned layer 2 and a protective layer 3. The lens body 1 has a central area C and a peripheral area P surrounding the central area C, wherein the central area C corresponds to the pupil position of the eye, and the peripheral area P corresponds to the iris position of the eye. The pattern layer 2 is disposed in the peripheral region P, and the protection layer 3 is disposed in the peripheral region P and covers the pattern layer 2 to isolate the pattern layer 2 from the outside. In the present embodiment, the projected area of the central area C is 15% to 25% of the total area of the lens body, and the projected area of the peripheral area P is 75% to 85% of the total area of the lens body 1.

The lens body 1 may be a light-transmitting body and has an inner surface 101 for contacting the surface of the wearer's eye and an outer surface 102 opposite to the inner surface 101, wherein the inner surface 101 is a concave surface and the outer surface 102 is a convex surface. In the present embodiment, the material of the lens body 1 may be silicone (silicone hydrogel) or hydrogel (hydro gel), and may be formed by a die casting method, but the application is not limited thereto.

Furthermore, the silica gel can improve the oxygen permeability of the lens body 1, thereby avoiding the occurrence of the condition of corneal hypoxia. Suitable silicones may be materials categorized by the U.S. Food and Drug Administration (FDA) into group 5, including: balafilcon a, comfilcon a, efrofilcon a, enfilcon a, galyfilcon a, lotrafilcon B, narafilcon a, narafilcon B, secofilcon a, delefilcon a, somofilcon a, and the like. Other beneficial ingredients, such as blue light and UV absorbers, may be added to the silicone lens body 1 as desired.

In addition, the hydrocolloid can improve the wettability and surface lubricity of the lens body 1, thereby improving wearing comfort. Suitable hydrocolloids can be low moisture (moisture content less than 50 weight percent) nonionic polymers classified by the FDA into group 1, including: helfilcon A & B, hioxifilcon B, mafilcon, polymacon, tefilcon, tetrafilcon A, etc. Suitable hydrocolloids may also be high water content (greater than 50 weight percent water content) nonionic polymers classified by the FDA into group 2, including: acofilcon a, alfafilcon a, hillafilcon B, hillafilcon D, nelfilcon a, nesofilcon a, omafilcon a, samfilcon a, and the like. Suitable hydrogels may also be low moisture content (moisture content less than 50 weight percent) ionic polymers (ionics polymers) classified by the FDA into group 3, including Deltafilcon a, and the like. Suitable hydrocolloids may also be high water content (greater than 50 weight percent water content) ionic polymers classified by the FDA into group 4, including: etifilcon A, focofilcon A, methafilcon B, ocufilcon A, ocufilcon B, ocufilcon C, ocufilcon D, ocufilcon E, phemfilcon A, vifilcon A, and the like.

The pattern layer 2 and the protective layer 3 may be formed by pad printing, wherein the protective layer 3 is disposed in the lens body 1 near the outer surface 102, the pattern layer 2 is disposed between the protective layer 3 and the lens body 1, and the pattern layer 2 is isolated from the outside because it is covered by the protective layer 3 and the lens body 1. In the present embodiment, the outer surface 102 of the lens body 1 has a concave space, and the pattern layer 2 and the protection layer 3 are both accommodated in the concave space, wherein the vertical distance d between the pattern layer 2 and the inner surface 101 of the lens body 1 can be between 5 micrometers (μm) and 100 micrometers (μm). The pattern layer 2 has a first gentle slope structure 21 with a maximum tangential angle between 10 degrees and 80 degrees. The protection layer 3 has a second gentle slope structure 31 with a maximum tangential angle between 5 degrees and 45 degrees.

It is noted that the protective layer 3 has a maximum outer diameter W1, the pattern layer 2 has a maximum outer diameter W2, the maximum outer diameter W1 of the protective layer 3 is not less than 6 millimeters (mm), and the following condition is satisfied that w2+w2×0.1% < w1< w2+w2×20%. Accordingly, the patterned contact lens L of the present application can meet general use requirements, and the protective layer 3 and the patterned layer 2 have a certain binding force, so that the color material in the patterned layer 2 can be prevented from diffusing outwards to contact with eyes of a wearer. In addition, the protective layer 3 can provide a good supporting effect for the pattern layer 2, and thus, the pattern profile in the pattern layer 2 is not deformed by the pressing of the lens body 1, i.e., the pattern layer 2 can stably exhibit a predetermined dressing effect in the lens body 1.

Further, the pattern layer 2 may have a single color or a pattern of multiple colors. Taking a pattern of multiple colors as an example, as shown in fig. 4, the pattern layer 2 may include multiple color layers 22 with different colors, and the multiple color layers 22 are separated from each other to form a predetermined pattern; alternatively, as shown in fig. 5 and 6, the color layers 22 are stacked to form a predetermined pattern. The composition of the pattern layer 2 is not important to the present application, and thus is not described in detail herein. Practically, the composition of the pattern layer 2 may include a polymer material, a colorant and a dispersant, but the present application is not limited thereto.

In the present embodiment, the plurality of color layers 22 may be a first color layer 22a and a second color layer 22b, respectively, the first color layer 22a has a first color mixing region 22a1, and a portion of the second color layer 22b is stacked on the first color mixing region 22a 1. The color layers may be a first color layer 22a, a second color layer 22b and a third color layer 22c, respectively, the first color layer 22a has a first color mixing region 22a1 and a second color mixing region 22a2, a portion of the second color layer 22b is stacked on the first color mixing region 22a1, and a portion of the third color layer 22c is stacked on the second color mixing region 22a 2.

The protective layer 3 is formed by mixing specific components in a specific ratio, and the protective layer 3 has good mechanical properties, proper viscosity and affinity, and good compatibility with the pattern layer 2. Accordingly, the protective layer 3 is not easily broken during the manufacturing process of the contact lens, which helps the pattern layer 2 to be more stably wrapped in the lens body 1; the protective layer 3 has good workability and is easily transferred into the mold after molding.

Further, the protective layer 3 includes a film-forming polymer, a hydrophilic polymer, and a solvent. The film-forming polymer is one or more selected from polyether polyol (polyether polyol), polyether (polyether), polyester polyol (polyester polyols), polyacrylic acid and its derivatives, polymethyl methacrylate (polymethyl methacrylate) and its derivatives, and styrene-acrylic copolymer (styrene-acrylic acid copolymer).

For example, the polyether polyol may have a molecular weight between 5000 and 50 ten thousand, which may use polyethylene glycol (polyethylene glycol), polypropylene glycol (polypropylene glycol), glycerol, caprolactone (caprolactone), or any combination thereof, or the like. Polyethers may have molecular weights between 5000 and 50 ten thousand, which may use ethylene oxide, propylene oxide, glycerol, or any combination thereof, or the like. The polyester polyol may use oxalic acid, malonic acid, glycerol, or any combination thereof, etc. The polyacrylic acid may have a molecular weight between 5000 and 150 ten thousand. Polyacrylic acid derivatives can be used as polyacrylates, for example potassium and sodium salts of acrylic acid. Polymethyl methacrylate may have a molecular weight between 5000 and 50 ten thousand. Copolymers of styrene and acrylic acid may be formed using 10-90% styrene monomer with 90-10% acrylic acid.

The content of the film-forming polymer is between 1 and 60%, preferably between 15 and 50%, based on the total weight of the protective layer 3. If the content of the film-forming polymer is less than 1%, the viscosity of the protective layer 3 is adversely affected and cannot be fixed at a specific position in the lens body 1; if the content of the film-forming polymer is more than 60%, the protective layer 3 may adversely affect the contact lens manufacturing process due to an excessively high viscosity.

The hydrophilic polymer is one or more selected from polyvinyl alcohol (polyvinyl alcohol), cellulose and its derivatives (cellulose and its derivatives), polyethylene glycol (polyethylene alcohol), polyvinylpyrrolidone and its copolymer (polyvinylpyrrolidone and its copolymer). For example, the polyvinyl alcohol may be a polymer having a degree of polymerization between 500 and 10000. The cellulose may have a molecular weight between 5000 and 50 ten thousand. The polyethylene glycol may have a molecular weight between 500 and 50 ten thousand. The polyvinylpyrrolidone may have a molecular weight of between 5000 and 150 ten thousand.

The content of hydrophilic polymer is between 0.1 and 45%, preferably between 5 and 40%, based on the total weight of the protective layer 3. If the content of the hydrophilic polymer is less than 1%, the viscosity of the protective layer 3 is adversely affected and cannot be fixed at a specific position in the lens body 1; if the content of the hydrophilic polymer is more than 45%, the protective layer 3 may adversely affect the contact lens manufacturing process due to an excessively high viscosity. In addition, the content of hydrophilic polymers can also affect the wearing comfort of the contact lens.

The solvent is one or more selected from water, alcohols and amides. Specific examples of the solvent include ethanol, propanol, N-methylpyrrolidone, dimethylacetamide, dimethylformamide, etc. The solvent content is between 30 and 90% based on the total weight of the protective layer 3.

Table 1 below shows a plurality of experimental examples of the protective layer 3, which have different composition components and dosage ratios, respectively. The results of the evaluations for these experimental examples and specific comparative examples are also shown in Table 1 below, wherein "very" represents good film formation/phase transfer results, "DELTA" represents good film formation/phase transfer results, and "gamma" represents poor film formation/phase transfer results. As can be seen from table 1, the protective layer 3 formed by mixing specific components in specific proportions can obtain an acceptable film formation/phase transfer effect. In addition, in comparative example 1, the content of the solvent was less than 30%, the content of the film-forming polymer in comparative example 2 was more than 60%, and the content of the hydrophilic polymer in comparative example 3 was more than 45%, and good film-forming/phase-transfer effects could not be obtained in any of comparative examples 1 to 3.

Referring to fig. 7-10, the detailed features of the patterned contact lens L of the present application are described above and the method of making the same is further described below. As shown in fig. 7, the manufacturing method first provides a first mold 4, which may be a master mold. In the present embodiment, the material of the first mold 4 may be metal or plastic, but the present application is not limited thereto.

Next, as shown in fig. 7, the material of the protective layer 3 is dipped by the glue head 5, and after a period of time is waited for the material to form a glue layer 3 'on the glue head 5, the glue layer 3' is pad-printed onto the molding surface 400 of the first mold 4 with a proper pressure, such as 0.1psig to 2.0psig, so as to form the protective layer 3, and the protective layer 3 has a second gentle slope structure 31. Then, as shown in fig. 8 and 9, the material of the pattern layer 2 is filled into the patterned groove 61 of a template 6, and a period of time is waited for, after the material forms another colloid layer 2 'in the patterned groove 61, the colloid layer 2' is pad-printed onto the surface of the protection layer 3 with a proper pressure, such as 0.1psig (gauge pressure) to 2.0psig, after curing, the pattern layer 2 is formed, and the pattern layer 2 has a first gentle slope structure 21. In the present embodiment, the template 6 may be a steel plate, and the patterned grooves 61 thereof may be formed by laser engraving, but the present application is not limited thereto. For example, in other embodiments, the template 6 may be made of other metal materials, and the patterned grooves 61 may be formed by chemical etching. In addition, if more than one color is used for the pattern layer 2, i.e., the pattern layer 2 includes multiple color layers 22, multiple pad printing steps with more than one template 6 may be required.

Finally, as shown in fig. 10, the material of the lens body 1 is injected into the first mold 4, and then a second mold 7 is used to close the first mold 4, i.e. the second mold 7 is pressed onto the first mold 4, and then the material is cured under the action of ultraviolet light (UV) or heat, so as to form the pattern layer 2 and the protective layer 3 covered by the lens body 1. When the first mold 4 and the second mold 7 are closed, the shape of the lens body 1 can be defined, wherein the molding surface 400 defines the outer surface 102 of the lens body 1 and the molding surface 700 defines the inner surface 101 of the lens body 1. In the present embodiment, the second mold 7 may be a male mold, and the material of the second mold 7 may be metal or plastic, but the present application is not limited thereto.

Advantageous effects of the embodiments

Furthermore, the protective layer is formed by mixing specific components in a specific ratio, so that the protective layer has good mechanical properties, proper viscosity and affinity, and good compatibility with the pattern layer. Accordingly, the protective layer is not easy to break during the manufacturing process of the contact lens, which is helpful for the pattern layer to be coated in the lens body more stably, and the protective layer has good processability, and is easy to be transferred into the mold after being molded.

The foregoing disclosure is only a preferred embodiment of the present application and is not intended to limit the scope of the claims, so that all equivalent technical changes made by the application of the present application and the accompanying drawings are included in the scope of the claims.

Claims

1. A patterned contact lens, the patterned contact lens comprising:

a lens body having an inner surface and an outer surface opposite the inner surface, wherein the inner surface is a concave surface and the outer surface is a convex surface;

a pattern layer disposed in the lens body and proximate to the outer surface, wherein a vertical distance is provided between the pattern layer and the inner surface, the vertical distance being between 5 microns and 100 microns; and

the protective layer is arranged in the lens body and is positioned between the pattern layer and the outer surface so as to isolate the pattern layer from the outside;

wherein the maximum outer diameter of the protective layer is not less than 6 mm; the maximum outer diameter of the protective layer is W1, and the maximum outer diameter of the pattern layer is W2, which satisfies the following condition W2+W2×0.1% < W1< W2+W2×20%.

2. The patterned contact lens of claim 1, wherein the patterned layer has a first gentle slope configuration with a maximum tangential angle between 10 degrees and 80 degrees.

3. The patterned contact lens of claim 2, wherein the protective layer has a second gentle slope structure with a maximum tangential angle between 5 degrees and 45 degrees.

4. The patterned contact lens of claim 1, wherein the patterned layer comprises a plurality of colored layers of different colors, and wherein the plurality of colored layers are separated from one another to form a predetermined pattern.

5. The patterned contact lens of claim 1, wherein the patterned layer comprises a plurality of colored layers of different colors, and wherein the plurality of colored layers are stacked to form a predetermined pattern.

6. The patterned contact lens of claim 5, wherein the plurality of color layers are a first color layer and a second color layer, respectively, the first color layer having a first color mixing region and a portion of the second color layer being stacked on the first color mixing region.

7. The patterned contact lens of claim 5, wherein the plurality of color layers are a first color layer, a second color layer, and a third color layer, respectively, the first color layer having a first color mixing region and a second color mixing region adjacent to each other, a portion of the second color layer being stacked on the first color mixing region, and a portion of the third color layer being stacked on the second color mixing region.

8. The patterned contact lens of claim 1, wherein the lens body has a central region and a peripheral region surrounding the central region, and the patterned layer and the protective layer are disposed in the peripheral region.

9. The patterned contact lens of claim 8, wherein the central region has a projected area of 15% to 25% of the total lens body area and the peripheral region has a projected area of 75% to 85% of the total lens body area.

10. The patterned contact lens of claim 1, wherein the protective layer comprises a film-forming polymer and a hydrophilic polymer, and wherein the film-forming polymer is present in an amount of between 15% and 50% and the hydrophilic polymer is present in an amount of between 5% and 40% based on the total weight of the protective layer.