TWM516169U - A chromatic contact lens - Google Patents

Description

Color contact lens

The present invention relates to a colored contact lens, and more particularly to a contact lens that prints ink onto the outer surface of a contact lens, thereby altering the appearance of the wearer's iris.

Contact lenses have been widely used for vision correction, and with the advancement of contact lens manufacturing technology, contact lenses of different shapes or colors have also been designed to improve their functionality and meet the needs of different social groups.

In addition to correcting vision, colored contact lenses can also discolor the iris or enlarge the shape of the iris, making the eyes look brighter and deeper, which is therefore favored by female consumers.

Conventional color contact lenses are produced by ink pad printing and multi-layer stacking, but ink pad printing exposes the ink layer to the surface of the lens. As shown in FIG. 1, the surface of the lens body 82 has a raised ink layer 81. Therefore, when wearing or blinking, the ink layer is easily peeled off due to the friction of the external force contact, and the convex ink layer may make the surface of the contact lens uneven, and the rough and uneven surface may easily cause foreign matter to the wearer's eyes. sense.

The multi-layer stacked color contact lens, as shown in FIG. 2, sandwiches the ink layer 91 between the lens bodies 92 and 93, so that the ink layer 91 does not fall off due to friction, and the surface roughness is not smooth. The problem, but the increase in thickness caused by the multilayer structure may cause insufficient oxygen permeability, which affects the comfort of wearing, and the multi-layer structure also increases the cost of its manufacture.

In view of this, how to make a colored contact lens with a flat surface without increasing its thickness is a technical problem to be solved by the present invention.

The main purpose of this creation is to provide the user to wear colored contact lenses to modify the color, shape and size of the iris to make the eyes bright, deep and magnified, and the ink color of the colored contact lenses does not cause contact lenses. Increased thickness or unevenness of the surface makes it more comfortable and safe for users to wear colored contact lenses.

In order to achieve the above object, the present invention provides a color water gel lens comprising a lens body having an outer surface and an inner surface, the lens body being composed of a central optical zone and an edge zone, wherein the edge zone The outer surface has an ink layer and the ink layer penetrates into the outer surface and forms a flat surface structure having a thickness of between 0.04 and 0.15 mm and a thickness of 0.22 mm.

In the above preferred embodiment, the composition of the ink layer comprises: toner, polyhydroxyethyl methacrylate, methacrylic acid and polyvinylpyrrolidone.

In the above preferred embodiment, wherein the ink layer comprises one or a plurality of geometric patterns.

In the above preferred embodiment, wherein the central optical zone has a diameter of between 5 and 10 mm.

In the above preferred embodiment, the central optical zone has a thickness of between 0.06 and 0.1 mm.

Please refer to FIG. 3, which is a schematic diagram of the upper mold, the lower film structure and the ink pad printing. As shown in FIG. 3, the apparatus for producing a color contact lens includes an upper mold 71 and a lower mold 72 made of a plastic material (polypropylene), wherein the upper mold 71 includes an upper mold bottom 73 and an upper mold. The lower mold 72 includes a lower mold bottom 74 and a lower mold side wall 76. When the upper mold 71 and the lower mold 72 are joined, the upper mold side wall 75 and the lower mold side wall 76 abut each other and will be on the upper mold bottom 73 and below. A gap of a certain shape is formed between the bottoms 74 of the mold, for example, a parabolic curved shape such as a contact lens. First, a circular hollow or arbitrarily shaped ink layer 21 is printed onto the upper surface of the lower mold bottom 74 in the lower mold 72. The composition of the ink layer 21 includes: polymethyl methacrylate in addition to the toner. Ethyl ester (HEMA), methacrylic acid (MAA) and polyvinylpyrrolidone (PVP), by virtue of the properties of these compositions, the ink layer 21 can be infiltrated into the lens body of the aqueous gel.

Next, please refer to FIG. 4 , which is a schematic diagram of the upper mold, the lower film structure and the water glue filling. As shown in FIG. 4, a water-filled filler 10 is added to the lower mold 72, and the water-filled filler 10 also covers the padded ink layer 21.

Subsequently, please refer to FIG. 5, which is a schematic diagram of the above-mentioned mold lower die structure pressing water gel lens. As shown in FIG. 5, the upper mold 71 is pressed into the lower mold 72, and the water-filled filler 10 is pressed and solidified by a gap formed between the upper mold bottom 73 of the upper mold 71 and the lower mold bottom 74 of the lower mold 72. In the same step, the ink layer 21 is also infiltrated into the cured water-filled filler to form a colored contact lens, and the press-cured water-filled filler 10 is the lens body 1 including the ink layer 21 shown in FIG.

Please refer to FIG. 6 again, which is a top view (A) and a side view (B) of the water-filled lens. As shown in Fig. 6, the produced color contact lens has a lens body 1, A represents a plan view of the lens body 1, B represents a side view of the lens body 1, and the lens body 1 has an outer surface 13 and an inner surface 14, and the lens body 1 is composed of a central optical zone 11 and an edge zone 12, and the outer surface 13 at the edge zone 12 has an ink layer 21 which allows the ink layer 21 to penetrate into the lens body made of water gel due to the characteristics of the composition of the ink layer 21. Among them, the outer surface 13 is still a flat surface structure without any convex structure.

The central optical zone 11 of the lens body 1 has a diameter D1 of between 5 and 10 mm. In a preferred embodiment, the central optical zone 11 has a diameter D1 of between 6.5 and 9 mm.

Furthermore, the thickness of the central optical zone 11 is between 0.04 and 0.15 mm, and in another preferred embodiment, the thickness of the central optical zone is between 0.06 and 0.1 mm. The edge region has a thickness of 0.22 mm.

In the present creation, the ink layer 21 of the pad printing can be made into geometric shapes of various sizes and colors according to the needs of the consumer, and the colors can be: blue, light blue, green blue, blue purple, gray, brown. , yellow or green; shape can be: serpentine, spiral, starburst, radiating stripe, spike, zigzag or texture, in addition, different colors and shapes can be matched with each other to achieve colorful Iris color change effect.

Compared with the prior art, the present invention provides a flat contact lens with a smooth surface, and the manufacturing method is simple and does not increase the thickness of the contact lens; therefore, the creation is a creation with great industrial value.

This creation has been modified by those skilled in the art, and is not intended to be protected as intended.

1, 82, 92, 93‧ ‧ lens body
10‧‧‧Water-filled filler
11‧‧‧Central Optical Zone
12‧‧‧Edge area
13‧‧‧ outer surface
14‧‧‧ inner surface
21, 81, 91‧ ‧ ink layer
71‧‧‧Upper mold
72‧‧‧ Lower mold
73‧‧‧ bottom of the upper mold
74‧‧‧ bottom of the lower mold
75‧‧‧Upper side wall
76‧‧‧Down sidewall
A‧‧‧Top view of the lens body
B‧‧‧ Side view of the lens body
D1‧‧‧Diameter of the central optical zone

1 is a schematic view of a conventional color contact lens using a conventional pad printing technique; FIG. 2 is a schematic view of a conventional color lens of a multi-layer structure; FIG. 3 is a schematic view of the upper mold, the lower film structure, and the ink pad printing. Schematic diagram; Figure 4 is a schematic diagram of the upper mold, the lower membrane structure and the water-filled filling; Figure 5 is a schematic view of the above-mentioned mold and lower mold structure pressing the water-plastic lens; Figure 6 is the creation of the water-based plastic lens Top view (A) and side view (B).

1‧‧‧ lens body

11‧‧‧Central Optical Zone

12‧‧‧Edge area

13‧‧‧ outer surface

14‧‧‧ inner surface

21‧‧‧Ink layer

A‧‧‧Top view of the lens body

B‧‧‧ Side view of the lens body

D1‧‧‧Diameter of the central optical zone

Claims (5)

A color water gel lens comprising a lens body having an outer surface and an inner surface, the lens body being composed of a central optical zone and an edge zone, wherein the outer surface of the edge zone has an ink layer And the ink layer penetrates into the outer surface and forms a flat surface structure having a thickness of 0.04-0.15 mm and a thickness of 0.22 mm. The colored hydrogel lens of claim 1, wherein the composition of the ink layer comprises: toner, polyhydroxyethyl methacrylate, methacrylic acid and polyvinylpyrrolidone. The colored hydrogel lens of claim 1, wherein the ink layer comprises one or more geometric patterns. The colored hydrogel lens of claim 1, wherein the central optical zone has a diameter of 5-10 mm. The colored hydrogel lens of claim 1, wherein the central optical zone has a thickness of between 0.06 and 0.1 mm.