CN111077680A

CN111077680A - Contact lens with pattern

Info

Publication number: CN111077680A
Application number: CN201811219704.2A
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: 2020-04-28
Also published as: CN117008356A

Abstract

The invention discloses a contact lens with patterns, which comprises a lens body, a pattern layer and a protective layer. The lens body is provided with a central area and a peripheral area surrounding the central area, the pattern layer and the protective layer are arranged in the peripheral area, and the pattern layer is covered by the protective layer to be isolated from the outside. Wherein the maximum outer diameter of the protective layer satisfies the following condition: w2 +/W2 × 0.1% < W1< W2 +/W2 × 20%, W1 represents the maximum outer diameter of the protective layer, and W2 represents the maximum outer diameter of the pattern layer. Thereby, the eyes of the wearer can be prevented from directly contacting the pattern layer.

Description

Contact lens with pattern

Technical Field

The invention relates to a contact lens, in particular to a contact lens with patterns.

Background

After the information society comes, as a result of frequent use of 3C products such as smart phones, computers, and the like, not only the rate of suffering from myopia of the national people is continuously increased, but also the age group with myopia tends to decline year by year. Wearing contact lenses is a good choice in view of aesthetics and ease of use.

In recent years, the development of contact lenses has been to add a decorative function, i.e. to arrange a specific color, pattern or combination thereof in the lens, from the original basic function of correcting vision, so as to satisfy the requirement of beautifying eyes. Many people today have a long-term habit of wearing colored contact lenses even without myopia, however, the colorants used to make colored contact lenses are more or less harmful to the wearer's eyes.

In addition, in the wearing or cleaning process of the color contact lens, the lens body is often repeatedly bent, which causes the contour of the pattern formed by the coloring layer covered in the lens body to be deformed and uneven, and in the worse case, the coloring material in the coloring layer will fall off to cause damage to the eyes.

Disclosure of Invention

The present invention is directed to a contact lens with a pattern, which is designed to provide both the beauty and safety of the wearer.

In order to solve the above technical problems, one of the technical solutions of the present invention is to provide a contact lens with a pattern, which includes a lens body, a pattern layer and a protective layer. The lens body is provided with a central area and a peripheral area surrounding the central area, the pattern layer is arranged in the peripheral area, and the protective layer is arranged in the peripheral area and covers the pattern layer so as to isolate the pattern layer from the outside. Wherein the maximum outer diameter of the protective layer is W1, the maximum outer diameter of the pattern layer is W2, and the following condition is satisfied, W2 +/W2 × 0.1% < W1< W2 +/W2 × 20%.

In an embodiment of the invention, the maximum outer diameter of the protective layer is not less than 6 mm.

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

In an embodiment of the invention, 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 invention, the color layers are a first color layer and a second color layer, respectively, the first color layer has a first color blending region, and a part of the second color layer is stacked on the first color blending region.

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

In an embodiment of the invention, a projected area of the central region is 15% to 25% of a total area of the lens body.

In an embodiment of the invention, the projected area of the peripheral region is 75% to 85% of the total area of the lens body.

In an embodiment of the invention, an inner concave space is formed on an outer surface of the lens body, and the protective layer and the pattern layer are accommodated in the concave space.

In an embodiment of the invention, the protective layer includes a film-forming polymer, a hydrophilic polymer and a solvent, based on the total weight of the protective layer, the content of the film-forming polymer is between 15% and 50%, the content of the hydrophilic polymer is between 5% and 40%, and the content of the solvent is between 30% and 90%.

One of the advantages of the present invention is that the contact lens with a pattern provided by the present invention can stably display a predetermined dressing effect in the lens body through the technical scheme that the protective layer covers the pattern layer to isolate the pattern layer from the outside, and the maximum outer diameters of the protective layer and the pattern layer satisfy a specific condition, and the pattern contour in the pattern layer is not deformed by the extrusion of the lens body, and the pigment in the pattern layer is not exposed or even falls off to hurt the eyes of a wearer.

For a better understanding of the features and technical content of the present invention, reference should be made to the following detailed description and accompanying drawings, which are provided for purposes of illustration and description only and are not intended to limit the invention.

Drawings

Fig. 1 is a schematic cross-sectional view of a contact lens with a pattern according to the present invention.

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

Fig. 3 is a schematic top view of the contact lens with pattern according to the present invention.

Fig. 4 is another enlarged schematic view of section II of fig. 1, showing a first embodiment of the pattern layer in the contact lens having a pattern according to the present invention.

Fig. 5 is a further enlarged view of section II of fig. 1, showing a second embodiment of the pattern layer in the contact lens having a pattern according to the present invention.

Fig. 6 is a further enlarged schematic view of section II of fig. 1, showing a third embodiment of the pattern layer in the contact lens with a pattern according to the present invention.

Fig. 7 to 10 are schematic views illustrating the manufacturing process of the contact lens with patterns according to the present invention.

Detailed Description

The following is a description of the embodiments of the "contact lens with pattern" disclosed in the present invention with specific embodiments, and those skilled in the art can understand the advantages and effects of the present invention from the disclosure of the present specification. The invention is capable of other and different embodiments and its several details are capable of modification and various other changes, which can be made in various details within the description and without departing from the spirit and scope of the invention. The drawings of the present invention are for illustrative purposes only and are not intended to be drawn to scale. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.

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 from one signal to another signal. In addition, the term "or" as used herein should be taken to 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 occurs in the singular, it is intended to cover the plural of such term. Laboratory procedures used herein are well known and commonly used in the art, and the methods used for such procedures are also provided in the general references.

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

Referring to fig. 1 to 3, an embodiment of the invention provides a contact lens L with a pattern, which is a sandwich structure and includes a lens body 1, a pattern 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 passivation 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 can be a transparent body and has an inner surface 101 for contacting with the eyeball surface of the wearer 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 this embodiment, the material of the lens body 1 may be silicone gel (hydrogel) or water gel (hydrogel), and may be formed by one-step molding, but the invention is not limited thereto.

Further, the silica hydrogel can improve the oxygen permeability of the lens body 1, so as to avoid the occurrence of corneal oxygen deficiency. Suitable silicone gums may be materials classified 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, Senofilcon A, Delefilcon A, and Somofilcon A, etc. Other beneficial ingredients, such as blue and UV absorbers, may be added to the silicone lens body 1 as desired.

In addition, the hydrogel can improve the wettability and surface lubricity of the lens body 1, thereby improving the wearing comfort. Suitable hydrocolloids may be FDA classified as group 1 low water content (less than 50 weight percent) nonionic polymers including: helfilcon A & B, Hioxifilcon B, Mafilcon, Polymacon, Tefilcon, and Tetrafilcon A. Suitable hydrocolloids may also be FDA classified as group 2 high water content (water content greater than 50 weight percent) nonionic polymers, including: acofilcon A, Alfafilcon A, Hilafilcon B, Hioxifilcon A, Hioxifilcon B, Hioxifilcon D, Nelfilcon A, Nesofilcon A, Omafilcon A, and Samfilcon A. Suitable water gels may also be ionic polymers (ionic polymers) classified by the FDA to group 3 at low water contents (less than 50 weight percent water), including Deltafilcon a, and the like. Suitable hydrocolloids may also be FDA classified as group 4 high water content (water content greater than 50 weight percent) ionic polymers, including: etafilcon 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 protection layer 3 can be formed by pad printing, wherein the protection layer 3 is disposed in the lens body 1 near the outer surface 102, the pattern layer 2 is disposed between the protection layer 3 and the lens body 1, and the pattern layer 2 is isolated from the outside by being coated by the protection layer 3 and the lens body 1. In the present embodiment, the outer surface 102 of the lens body 1 has a recessed space, and the pattern layer 2 and the protection layer 3 are both accommodated in the recessed space, wherein a vertical distance d from the pattern layer 2 to the inner surface 101 of the lens body 1 may 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 passivation layer 3 has a second gentle slope structure 31 with a maximum tangential angle between 5 degrees and 45 degrees.

It should be noted that the passivation 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 passivation layer 3 is not less than 6 mm (mm), and the following conditions are satisfied, W2 +/W2 × 0.1% < W1< W2 +/W2 × 20%. Therefore, the contact lens L with the pattern can meet the general use requirements, and the protective layer 3 and the pattern layer 2 have certain bonding force, so that the coloring material in the pattern layer 2 can be prevented from diffusing outwards and contacting the eyes of a wearer. In addition, the protective layer 3 can provide a good supporting function to the pattern layer 2, and thus, the outline of the pattern 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 cosmetic effect in the lens body 1.

Further, the pattern layer 2 may have a pattern of a single color or a plurality of colors. Taking a multi-color pattern as an example, as shown in fig. 4, the pattern layer 2 may include a plurality of color layers 22 with different colors, and the 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 in the present invention, and therefore, will not be described in detail herein. In practice, the composition of the pattern layer 2 may include a polymer material, a colorant and a dispersant, but the present invention is not limited thereto.

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

The protective layer 3 is formed by mixing specific components according to 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 damaged during the manufacturing process of the contact lens, which helps the pattern layer 2 to be more stably coated in the lens body 1; the protective layer 3 also has good processability and can be easily transferred to a 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 a combination of two or more selected from polyether polyol (polyether polyol), polyether polyol (polyether), polyester polyol (polyester polyol), polyacrylic acid and its derivatives, polymethyl methacrylate (polymethyl methacrylate) and its derivatives, and styrene-acrylic acid copolymer (styrene-acrylic acid copolymer).

For example, the polyether polyol may have a molecular weight between 5000 and 50 million, which may use polyethylene glycol (polyethylene glycol), polypropylene glycol (polypropylene glycol), glycerol, caprolactone (caprolactone), or any combination thereof. The polyether may have a molecular weight between 5000 and 50 ten thousand, which may use ethylene oxide, propylene oxide, glycerin, or any combination thereof. The polyester polyol can use oxalic acid, malonic acid, glycerol, or any combination thereof. Polyacrylic acid may have a molecular weight between 5000 and 150 ten thousand. Polyacrylic acid derivatives, such as potassium and sodium salts of acrylic acid, may be used. The polymethylmethacrylate may have a molecular weight between 5000 and 50 ten thousand. Copolymers of styrene and acrylic acid can be formed using 10-90% styrene monomer and 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 viscosity of the protective layer 3 is too high, which adversely affects the process of manufacturing the contact lens.

The hydrophilic polymer is one or more selected from polyvinyl alcohol (PVA), cellulose and its derivatives, polyethylene glycol (PEG), polyvinylpyrrolidone (PVP) and its copolymer (PVP) and their combination. 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 between 5000 and 150 ten thousand.

The content of the 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 viscosity of the protective layer 3 is too high, which may adversely affect the manufacturing process of the contact lens. In addition, the content of the hydrophilic polymer also affects 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, and dimethylformamide. The content of the solvent 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, each of which has different composition and amount ratios, and table 1 below shows the evaluation results of these experimental examples and specific comparative examples, where "◎" represents that the film forming/phase transfer effect is good, "△" represents that the film forming/phase transfer effect is good, and "gamma" represents that the film forming/phase transfer effect is not good, and it can be seen from table 1 that an acceptable film forming/phase transfer effect can be obtained with the protective layer 3 formed by using specific composition and mixing them in a specific ratio, and in addition, the content of the solvent in comparative example 1 is less than 30%, the content of the film-forming polymer in comparative example 2 is more than 60%, and the content of the hydrophilic polymer in comparative example 3 is more than 45%, and no good film forming/phase transfer effect can be obtained in any of comparative examples 1 to 3.

Referring to fig. 7 to 10, the contact lens L with patterns according to the present invention has been described in detail above, and the manufacturing method thereof will be further described. As shown in fig. 7, the manufacturing method first provides a first mold 4, which may be a mother mold. In the present embodiment, the material of the first mold 4 may be metal or plastic, but the invention is not limited thereto.

Next, as shown in fig. 7, the glue head 5 is used to pick up the material of the protection layer 3, and after a period of time, the material forms a glue layer 3 'on the glue head 5, and then the glue layer 3' is transferred onto the molding surface 400 of the first mold 4 at a suitable pressure, such as 0.1psig to 2.0psig, to form the protection layer 3, and the protection layer 3 has a second gentle slope structure 31. Then, as shown in fig. 8 and fig. 9, the material of the patterned layer 2 is filled into the patterned groove 61 of a template 6, and after a period of time, the material forms another colloid layer 2 'in the patterned groove 61, the colloid layer 2' is transferred onto the surface of the passivation layer 3 at a suitable pressure, for example, 0.1psig (gauge pressure) to 2.0psig, and the patterned layer 2 is formed after curing, and the patterned layer 2 has a first graded structure 21. In the present embodiment, the template 6 may be a steel plate, and the patterned groove 61 may be formed by laser engraving, but the present invention is not limited thereto. For example, in other embodiments, the template 6 may be made of other metal materials, and the patterned groove 61 may be formed by chemical etching. In addition, if more than one color is used for pattern layer 2, i.e., 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 on the first mold 4, and then the material is cured under the action of ultraviolet light (UV) or heat, so as to form the lens body 1 covering the pattern layer 2 and the protective layer 3. 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 this 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 invention is not limited thereto.

[ advantageous effects of the embodiments ]

Furthermore, since the protective layer is formed by mixing specific components in a specific ratio, it has good mechanical properties, proper viscosity and affinity, and good compatibility with the pattern layer. Therefore, the protective layer is not easy to break in the manufacturing process of the contact lens, and the pattern layer is more stably coated in the lens body; the protective layer has good processability and can be easily transferred into a mold after molding.

The disclosure is only a preferred embodiment of the invention and should not be taken as limiting the scope of the invention, so that the invention is not limited by the disclosure of the specification and drawings.

Claims

1. A contact lens with a pattern, the contact lens with a pattern comprising:

a lens body having a central area and a peripheral area surrounding the central area;

the pattern layer is arranged in the peripheral area; and

a protection layer disposed in the peripheral region and covering the pattern layer to isolate the pattern layer from the outside, wherein the maximum outer diameter of the protection layer is W1, and the maximum outer diameter of the pattern layer is W2, which satisfies the following conditions: W2 +/W2 × 0.1% < W1< W2 +/W2 × 20%.

2. The patterned contact lens of claim 1, wherein the protective layer has a maximum outer diameter of not less than 6 mm.

3. The patterned contact lens of claim 1, wherein the pattern layer comprises a plurality of color layers with different colors, and the color layers are separated from each other to form a predetermined pattern.

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

5. The patterned contact lens of claim 4, wherein the plurality of color layers are a first color layer and a second color layer, respectively, the first color layer has a first blending region, and a portion of the second color layer is stacked on the first blending region.

6. The patterned contact lens of claim 4, 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 has a first blending region and a second blending region adjacent to each other, a portion of the second color layer is stacked on the first blending region, and a portion of the third color layer is stacked on the second blending region.

7. The patterned contact lens of claim 1, wherein the projected area of the central zone is 15% to 25% of the total area of the lens body.

8. The patterned contact lens of claim 1, wherein the projected area of the peripheral zone is 75% to 85% of the total area of the lens body.

9. The patterned contact lens of claim 1, wherein the lens body has an inner concave space on an outer surface thereof, and the protective layer and the pattern layer are accommodated in the concave space.

10. The patterned contact lens of claim 1, wherein the protective layer comprises a film-forming polymer, a hydrophilic polymer and a solvent, wherein the content of the film-forming polymer is between 15% and 50%, the content of the hydrophilic polymer is between 5% and 40%, and the content of the solvent is between 30% and 90%, based on the total weight of the protective layer.