KR100586160B1 - Color contact lens - Google Patents

Abstract

The present invention provides a contact lens having a pupil part and an iris pattern, wherein the iris pattern is divided into a first part, a second part, and a third part, wherein the first part is placed outside the iris and the second part is made of a second part. The first part is placed inside the second part, the third part is placed inside the second part, and the first non-uniform boundary separates the first part from the second part, and the distance (R5) of the first non-uniform boundary is the radial width of the iris part ( 25% to 33% of R7), and the second non-uniform boundary separates the second and third portions, and the distance (R6) of the second non-uniform boundary is 25% to 50% of the iris portion radial width (R7). It is a color contact lens characterized in that.

Contact lens, first part, second part, third part, color element

Description

Color contact lenses {omitted}

1 is a detailed view showing three areas of the iris pattern of the present invention

Figure 2 is a detailed view of the dots printed on the three areas of the iris pattern of the present invention

Figure 3 is a detailed view showing three areas of the iris pattern of the present invention by a line

<Explanation of symbols for main parts of drawing>

10: first part 20: second part

30: third part 40: first non-uniform boundary

50: second non-uniform boundary 60: color element

The appearance of the human iris is relatively complex, showing a variety of colors and textures. The appearance of a natural iris is not a monochromatic color, but a structure containing many lines and different colors.

The color of the eyes of a person is determined by the melanin pigments as well as the color of the skin. If a lot of melanin is in the iris, it becomes black or brown eyes, and if it is small, blue or green eyes are used. In most cases blue or green.

Therefore, in addition to the fundamental functions of contact lenses that have been used instead of eyeglasses in recent years for improving vision correction and improving bills, those who want to create their own personality by avoiding the color of their own eyes appearing for the above reasons In order to apply color to the eyes according to one's fashion sense, there is a trend of selecting and using beauty color contact lenses having various colors.

In general, there are two types of cosmetic color contact lenses, the first of which is a transparent colored lens. Transparent colored lenses have been developed for the purpose of emphasizing transparency or blocking light rays rather than changing the original iris color.

The second is an opaque colored lens that can change the original iris color to another color.

Colorants have been added to contact lenses to give them a cosmetic effect on the eyes of people wearing them. For example, color contact lenses have emerged to change the eye color of a person wearing contact lenses. Color contact lenses can cause the eyes to appear in a different natural color, or the human eye can be seen in a color that is not naturally occurring.

In general, color contact lenses are manufactured in two ways. One is to bind or capture a diazo, triazo or reducing dye that penetrates the lens. This method is limited because only dyes that are not opaque can be used. The resulting contact lens is colored, but the entire lens still transmits a significant amount of light through the portion of the lens covering the iris. This generally tends to result in subtle color changes, reducing the usefulness of the lens, for example, bringing a change in appearance to the black eye.

The opaque lens uses a reducing dye, diazo or triazo dye, first immersing the hydrophilic lens in BaCl solution, removing the lens from BaCl solution, immersing the lens in H2 SO4 solution, and causing the barium to precipitate with sulfate ions. It can be prepared by forming BaSO 4. Reducing dyes, diazo or triazo dyes can then be added to produce an opaque color. However, this method is very time consuming, requires many steps, and is difficult to scale up.

Another common method of making color contact lenses is to print ink-containing pigments (or pigments) on the surface of the lens.

This can be done by printing the ink directly on the surface of the lens or by printing it on a casting cup and transferring the print to the lens. Printing is also thought to be somewhat limited due to the type of pigments used so far. These pigments absorb and reflect light to produce a cosmetic effect. For example, the texture is obtained by selecting the pattern of applying ink to the lens surface and the number of ink colors applied. Current technology relies on pigments that are limited or uncharacteristic, not direct absorption or reflection of light.

Therefore, the present invention is to improve the eye color of the wearer by developing an improved color contact lens of the wearer and to give a natural appearance effect by excellent cosmetic effect.

The present invention provides a contact lens having a pupil part and an iris pattern, wherein the iris pattern is divided into a first part, a second part, and a third part, wherein the first part is placed outside the iris and the second part is made of a second part. It lies inside one part and the third part lies inside the second part, and the first non-uniform boundary separates the first and second parts, and the second non-uniform boundary separates the second and third parts. In this regard, the distance R5 of the first non-uniform boundary is 25% to 33% of the radial width R7 of the iris portion, and the second non-uniform boundary separates the second and third portions from each other. The distance R6 is a color contact lens, characterized in that 25% to 50% of the iris portion radial width R7.

The pattern element may be a dot. The first part, the second part, and the third part may have different colors, and the first part, the third part may have the same color.

In particular, the first part may be configured to overlap the second part at several points and the second part may overlap the third part at various points.

In addition, in the present invention, the iris pattern is divided into a first portion, a second portion, and a third portion, wherein the first portion is placed outside the iris and the second portion is placed inside the first portion and the third portion is Is placed inside the second part and the first non-uniform boundary separates the first and second parts, and the second non-uniform boundary separates the second and third parts, with an average pupil radius at the center of the pupil. (R1) is 2.2 to 3 mm and the outer radius R2 of the iris is 5.5 to 6 mm and the radius R3 of the second non-uniform boundary at the center point of the iris is 3.5 to 4.5 mm and of the first non-uniform boundary at the center point of the iris. Radius R4 is a color contact lens, characterized in that 4.5 to 5.8mm.

In the present invention, the second portion constitutes 20 to 80% of the total area of the iris pattern, and the second portion is alternately repeated with a giant stripe having a color element and a giant stripe without a color element. The large striped pattern has a color contact lens, covering 31 to 50% of the second portion.

The present invention also provides a contact lens having a pupil part and an iris pattern, wherein the iris pattern is divided into a first part, a second part, and a third part, wherein the first part is placed outside the iris and the second part. Is placed inside the first portion, and the third portion is placed inside the second portion, and the first non-uniform boundary separates the first portion from the second portion, and the distance (R5) of the first non-uniform boundary is The proper ratio of the value R8 excluding the distance R5 of the first non-uniform boundary and the distance R6 of the second non-uniform boundary from the distance R6 of the bi-uniform boundary and the radial width R7 of the bi-uniform boundary is 10 to 10. 20: 60 to 70: 20 to 40, the color contact lens characterized in that.

The raw materials of the contact lens are mixed in a stirring vessel containing a magnetic bar and thoroughly mixed. Then, 0.2 ml of the monomer mixture is put into a male mold using a micro pipette and exposed to a wavelength of 365 nm ultraviolet light for 15 minutes to make a contact lens.

Next, after the mold is detached and the polymerized material is confirmed and inspected, the convex portion of the resultant is cut thinly, and then the iris portion except for the optical portion when worn is colored with a transparent color or an opaque pigment.

The color element mainly has a circular dot shape but may have a hexagonal shape or any shape, such as a square, an ellipse, a triangle, a straight line, a stripe or a feather shape.

In addition, the color element may have a grid. The third portion and the third portion may be opaque for dark eyes or transparent for bright eyes.

The macrostripes with color elements and the macrostripes without color elements are alternately repeated, but the arrangement is irregular, and the macrostripes with epithelial color elements and the macrostripes without color elements are alternately repeated, but the arrangement is regular It can also be produced.

Sometimes, giant stripes with color elements and giant stripes without color elements can overlap each other as needed.

The stripes are spread radially outward, roughly like wheel spokes.

The color element may be applied to the rear (or eye) side, surface or front side (or object side) of the lens, the surface of the lens or a combination thereof, but preferably all layers are on the front surface of the lens. In addition, the layers may be applied or printed in any order.

It may be any color including blue, green, gray, brown, yellow, red, or a combination thereof of various hues and saturations.

The present invention will be described below with reference to the accompanying drawings.

1 is a detailed view showing three areas of the iris pattern of the present invention, Figure 2 is a detailed view of the dots printed on the three areas of the iris pattern of the present invention, Figure 3 is a three areas of the iris pattern of the present invention It is the detail which it displayed with the line.

The present invention can be used to provide color hard contact lenses or soft contact lenses, made of any known lens forming material, or materials suitable for making such lenses. Soft contact lenses are particularly preferred, and the material selected for forming the lenses of the present invention is any material suitable for producing soft contact lenses.

Preferred materials suitable for forming soft contact lenses using the method of the present invention are mainly silicone elastomers, silicone-containing macromers, hydrogels, silicone-containing hydrogels, and combinations thereof. In particular, the surface is a siloxane or consists of monomers containing siloxane functional groups, silicone hydrogels, or hydroxy groups, carboxyl groups or both, including polydimethyl siloxane macromers, methacryloxypropyl polyalkyl siloxanes and mixtures thereof Hydrogels consisting of silicone-containing polymers such as siloxanes, hydrogels, silicone hydrogels, and combinations thereof. Materials for making soft contact lenses are well known and commercially available. Preferably the material is acquafilcon, etafilcon, genfilcon or lenefilcon.

The color portions of the opaque and translucent color layers can be prepared from any organic or inorganic pigment, or combination of such pigments, suitable for use in contact lenses. Opacity can be controlled by varying the concentration of pigment and titanium dioxide used, with larger amounts producing greater opacity.

Examples of organic pigments include phthalocyanine blue, phthalocyanine green, carbazole purple, bat orange 1, and combinations thereof.

Examples of useful inorganic pigments are iron oxide black, iron oxide brown, iron oxide yellow, iron oxide red, titanium dioxide and the like and combinations thereof.

In addition to these pigments, soluble and insoluble dyes including, but not limited to, dichlorotriazine and vinyl sulfone dyes may be used. The selected dyes or pigments may be combined with one or more prepolymers, or binding polymers, and solvents to form the colorants used to prepare the translucent and opaque layers used in the lenses of the invention.

As one embodiment in forming and printing a pattern as described above, the present invention describes a method of transferring a transfer sheet having a pattern formed by printing on the surface of a contact lens by using a transfer machine to obtain a desired pattern.

The transfer paper is laminated in the order of paper, a penetration preventing material, a heat release material, a transfer pattern color ink layer, and an adhesive.

In particular, the adhesive is a hot melt adhesive, for example, thermoplastic resins such as polyvinyl acetate, polyamide, phenoxy resin, ethyl celluloid, polyisobutylene, petroleum resin, polyester, and the transfer temperature is 150 ℃ to 250 ℃ The pressure may be between 900 kg / cm 3 and 1100 kg / cm 3.

In the present invention, the heat release agent is EVA (ethylene vinyl ester) or a mixture of EVA and wax is used as a material to be melted during the process of heating, pressurization during transfer printing, the penetration preventing material to prevent the offset ink from penetrating into the paper As the plastic film, OPP film and the like can be used as a material having a property of preventing the penetration of water, such as a plastic film.

In addition, the pattern printing may be any one of offset printing, silkscreen printing, and gravure printing.

The transfer machine uses a lapping machine, a laminating machine, an overlay machine, and a heat transfer machine.

In addition, the transfer paper may be laminated in the order of a paper sheet, a penetration preventing material, a thermosetting paint layer, a transfer pattern color ink layer, an adhesive, and the thermosetting paint layer has a special durability after the heat transfer coating. As the thermosetting resin which can be formed, an acrylic resin, an epoxy resin or a urea resin can be used.

Referring to a specific transfer machine described above, the transfer machine includes a lower conveyor for horizontally transferring a contact lens to be thermally transferred and a plurality of transfer rollers disposed with a predetermined gap therebetween, wherein the transfer roller and the conveyor And a heat transfer roller for thermally transferring the transfer paper to the surface of the contact lens conveyed by heat-compressing the transferred transfer paper while being axially rotated, and the transfer paper roll for supplying the transfer paper adjacent to the surface of the contact lens conveyed by the thermoelectric roller. The upper part of the yarn roller is a transfer machine covered with a heating plate with a heating wire.

Or the transfer machine is fixed to the guide plate is installed on the upper side of the frame and the guide plate is coupled to the support plate moved by the operation of the chain in accordance with the operation of the drive motor, the upper side of the support plate of the crank connected to the drive motor According to the operation, the hot plate which is elevated by the operation of the link for converting the circular motion into the linear motion is configured to be supported by the spring inserted in the guide rod.

Or, the transfer machine is fixed to the guide plate is installed on the upper side of the frame and the guide plate is coupled to the guide plate which is moved in accordance with the operation of the hydraulic cylinder is guided by the operation of the hydraulic cylinder is moved back and forth, and the hydraulic pressure to the upper side of the support plate The cylinder may be installed so that the hot plate is elevated according to the operation of the hydraulic cylinder.

Accordingly, the present invention can provide a lens having a very natural eye color of the lens wearer and an excellent aesthetic appearance.

Claims (8)

In a contact lens having a pupil and an iris pattern, the iris pattern is divided into a first portion 10, a second portion 20, and a third portion 30, wherein the first portion 10 is formed of the iris. Lies outside and the second portion 20 lies inside the first portion 10 and the third portion 30 lies inside the second portion 20 and the first non-uniform boundary 40 is first The distance (R5) of the first non-uniform boundary is 25% to 33% of the iris portion radial width (R7), and the second non-uniform boundary (50) is defined as distinguishing the portion 10 and the second part 20. A color contact lens, which distinguishes the second portion 20 and the third portion 30, wherein the distance R6 between the second non-uniform boundary is 25% to 50% of the radial width R7 of the iris portion. 2. The color contact lens of claim 1, wherein the pattern element is a dot. 2. The color contact lens of claim 1, wherein the first portion (10), the two portion (20), and the three portion (30) are different in color. 2. The color contact lens according to claim 1, wherein the first portion (10) and the three portion (30) have the same color. 2. The color contact as claimed in claim 1, wherein the first portion 10 overlaps the second portion 20 at several points and the second portion 20 overlaps the third portion 30 at several points. lens. In a contact lens having a pupil and an iris pattern, the iris pattern is divided into a first portion 10, a second portion 20, and a third portion 30, wherein the first portion 10 is formed of the iris. Lies outside and the second portion 20 lies inside the first portion 10 and the third portion 30 lies inside the second portion 20 and the first non-uniform boundary 40 is first The portion 10 and the second portion 20 are distinguished, and the second non-uniform boundary 50 distinguishes the second portion 20 and the third portion 30, and the average pupil radius at the center point of the pupil portion ( R1) is 2.2 to 3 mm and the outer radius R2 of the iris is 5.5 to 6 mm and the radius R3 of the second nonuniform boundary at the center of the iris is 3.5 to 4.5 mm and the radius of the first nonuniform boundary at the center of the iris. (R4) is a color contact lens, characterized in that 4.5 to 5.8mm. The method according to claim 1 or 6, wherein the second portion 20 constitutes 20 to 80% of the total area of the iris pattern, and the second portion 20 has a giant stripe having color elements and no color elements. Giant contact stripes are alternately repeated, but the color stripes having color elements cover 31 to 50% of the second portion (20) color contact lens. In a contact lens having a pupil and an iris pattern, the iris pattern is divided into a first portion 10, a second portion 20, and a third portion 30, wherein the first portion 10 is formed of the iris. Lies outside and the second portion 20 lies inside the first portion 10 and the third portion 30 lies inside the second portion 20 and the first non-uniform boundary 40 is first The portion 10 and the second portion 20 are distinguished from each other, and the second non-uniform boundary 50 separates the second portion 20 and the third portion 30 from each other. R5) and the distance (R6) of the second nonuniform boundary and the value (R8) excluding the distance (R5) of the first nonuniform boundary and the distance (R6) of the second nonuniform boundary from the iris portion radial width (R7) The color contact lens, characterized in that the ratio of 10 to 20: 60 to 70: 20 to 40.

Images