JP2013250352A - Contact lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contact lens capable of expressing natural iris patterns and easily adjusting an impression and the like of the iris patterns.SOLUTION: The contact lens according to the present invention includes iris patterns, and the iris pattern has double or more annular colored lines, distances of which from the center are not fixed. It is preferable that the distance of each annular colored line from the center changes periodically. One period of the annular colored line comprises a random zigzag line and preferably, the periodicity of each annular colored line is 2 or more and 30 or less.

Description

  The present invention relates to a contact lens.

  Contact lenses with an iris pattern are used for cosmetic applications. As such contact lenses, in order to express a more natural iris pattern, those expressing an iris pattern with an outer burst pattern and an inner burst pattern, those expressing an iris pattern with a plurality of interconnected lines, etc. Various patterns have been developed (Japanese Patent Laid-Open No. 2000-66147, Japanese Patent Laid-Open No. 03-15020, Japanese Patent Laid-Open No. 2004-503815, Japanese Patent Laid-Open No. 2008-511025 and Japanese Patent Laid-Open No. 04- 505972).

  However, it is difficult to say that these contact lenses sufficiently express a natural iris pattern. In addition, since the iris pattern is formed in an irregular shape, for example, when trying to change the impression of the iris pattern according to the use etc., the pattern is adjusted by trial and error or empirical rules. It is not easy to adjust the iris pattern.

JP 2000-66147 A Japanese Patent Laid-Open No. 03-15020 JP-T-2004-503815 Special table 2008-511025 gazette Japanese National Publication No. 04-505972

  The present invention has been made based on the above circumstances, and an object thereof is to provide a contact lens that can express a natural iris pattern and can easily adjust the impression of the iris pattern and the like. .

The invention made to solve the above problems is
A contact lens having an iris pattern,
The iris pattern includes a double or more annular colored line whose distance from the center is not constant.

  In the contact lens, the iris pattern is provided with a double or more annular colored line whose distance from the center is not constant, and a natural iris pattern is expressed by the double or more annular colored line having such a shape. Can do. Further, according to the contact lens, the impression of the iris pattern and the like can be easily adjusted by changing the interval, shape, uneven height, etc. of the double or more annular colored lines.

  The plurality of annular colored lines are preferably substantially similar to each other. By forming the annular colored line in this way, a more natural iris pattern can be expressed.

  It is preferable that the color, density, or luminance of the annular colored line changes continuously or discontinuously within one annular colored line or between a plurality of annular colored lines. By forming the annular colored line in this way, it is possible to express a more natural iris pattern, and by adjusting the color, density, or brightness in this way, it is also possible to adjust the impression of the iris pattern, etc. It can be done easily.

  It is preferable that the change is a decrease in the density outward or a change in the circumferential direction. By making the color change of the annular colored line in this way, a more natural iris pattern can be expressed.

  The width of the annular colored line on the outermost periphery is preferably 0.2 mm or more and 2.5 mm or less. By forming the iris pattern in this way, a more natural iris pattern can be expressed.

  It is preferable that the plurality of annular colored lines have different widths. By forming the iris pattern in this way, a more natural iris pattern can be expressed.

  It is preferable that the distance from the center of each said annular coloring line changes periodically. A more natural iris pattern can be expressed because the annular colored line has such periodicity. In addition, adjustment of the impression of the iris pattern and the like is facilitated by changing the cycle.

  It is preferable that one period of each of the annular colored lines is a random zigzag line, and the number of periods of each of the annular colored lines is 2 or more and 30 or less. By doing so, it is possible to reproduce a pattern closer to the human iris.

  It is preferable that the iris pattern further includes an annular colored band, and an outer edge of the annular colored band is a substantially circular shape formed outside the annular colored line on the outermost periphery. The annular colored band represents a limbal ring that is the outer edge of a black eye. Therefore, a more natural iris pattern can be expressed because the iris pattern has such an annular colored band.

When the distance from the center of the annular colored line to the point on the shortest annular colored line is r, and the difference (R−r) between the radius (R) of the lens and the r is x,
It is preferable that the annular colored line on the outermost periphery is formed in a region surrounded by a circle having the same center and a radius of r + 0.15x and a circle having a radius of r + 0.95x. By arranging the annular colored lines on the outermost circumference in this way, a more natural iris pattern can be expressed.

When the distance from the center of the annular colored line to the point on the shortest annular colored line is r, and the difference (R−r) between the radius (R) of the lens and the r is x,
It is also preferable that the innermost colored ring line is formed in a region surrounded by a circle having the same center and a radius of r and a circle having a radius of r + 0.8x. A more natural iris pattern can be expressed also by arranging the innermost annular colored lines in this way.

  It is preferable that the inner edge of the annular colored band is the innermost annular colored line. By doing in this way, the impression of an iris pattern can be changed, such as an annular colored band (limbal ring) being emphasized.

  Here, the “zigzag line” refers to a line formed by bending a straight line many times to the left and right. However, there may be a curved part such as a bent part or a discontinuous part. “One period” means a minimum repeating unit of a zigzag line having periodicity and repeating the same. The “number of periods” refers to the number of the minimum repeating units in the zigzag line constituting one annular colored line. In addition, the shape and size of the entire contact lens and each part indicate the shape as a plane when the contact lens is viewed from the front, and the size in the shape as the plane, unless otherwise specified. And

  As described above, according to the contact lens of the present invention, a natural iris pattern can be expressed, and the impression and the like of the iris pattern can be easily adjusted. Therefore, the contact lens can be suitably used for cosmetic applications.

1 is a schematic plan view showing a contact lens according to a first embodiment of the present invention. (A) is a schematic plan view showing an annular colored line inside the contact lens according to the first embodiment, and (b) is a schematic plane showing an annular colored line outside the contact lens according to the first embodiment. FIG. It is a schematic diagram which shows the iris pattern which concerns on 2nd embodiment. It is a schematic diagram which shows the cyclic | annular coloring line which concerns on 3rd embodiment.

  Hereinafter, embodiments of the contact lens of the present invention will be described in detail with reference to the drawings as appropriate.

(First embodiment)
The contact lens 10 of FIG. 1 has a contact lens base material 11 and an iris pattern 12 applied to the surface of the contact lens base material 11.

  The shape of the contact lens 10 is the same as that of a conventional contact lens. Specifically, the contact lens 10 has a partial spherical shell shape including a surface having a spherical convex shape and a back surface having a spherical concave shape so as to be worn superimposed on the surface of the cornea of the eye. is there.

  The size of the contact lens 10 is not particularly limited, and can be the same size as a known contact lens.

  The material of the contact lens substrate 11 is not particularly limited, and a known material can be used. Specifically, in addition to hard lenses such as RGP lenses (oxygen-permeable lenses) and PMMA (polymethyl methacrylate), water-containing materials such as PHEMA (polyhydroxyethyl methacrylate) and non-water-containing materials such as acrylic elastomers or silicones Soft contact lenses having high oxygen permeability such as hydrogel can be used. In particular, a soft contact lens can be suitably used because it is generally larger in diameter than a hard contact lens and has a large area on which a pattern can be applied.

  The contact lens 10 (contact lens base material 11) may have specific optical characteristics with respect to the central portion superimposed on the cornea. In this case, the contact lens 10 can be used as a vision correction contact lens having a correction function for abnormal vision such as myopia, hyperopia, astigmatism, and presbyopia. The contact lens 10 may be a non-sight correction contact lens that does not have optical characteristics at the central portion. When the contact lens 10 is a non-sight correction contact lens, it can be used for cosmetics, for example.

  The iris pattern 12 includes a double annular coloring line 13 and an annular coloring band 14. The iris pattern 12 is formed in the peripheral region on the surface of the contact lens substrate 11.

  The annular colored line 13 includes an inner (innermost) annular colored line 13a and an outer (outermost) annular colored line 13b. Each annular colored line 13 is arranged on a concentric ring centered on the lens center 15.

  The inner annular colored line 13a and the outer annular colored line 13b are substantially similar with the lens center 15 as the center. By forming the annular colored line 13 in this way, a more natural iris pattern can be expressed. The similarity ratio at this time is not particularly limited, but the similarity ratio of another annular coloring line (annular coloring line 13b) when the innermost annular coloring line (annular coloring line 13a) is 1 is 1.02. The range is preferably 3 or less and more preferably 1.02 or more and 2 or less. With such a similarity ratio, a more natural iris pattern can be expressed.

  Each annular colored line 13 (13a, 13b) has a non-circular shape with a constant distance from the center 15. Specifically, each annular colored line 13 is composed of a line having periodicity in which the distance from the center 15 changes periodically. The annular colored line 13 has a periodicity as described above, so that a natural iris pattern can be expressed. In addition, adjustment of the impression of the iris pattern and the like is facilitated by changing the cycle.

  One period of the annular colored line 13 is composed of a random zigzag line. In the annular colored line 13 in FIG. 1, one period is mainly formed by a zigzag line having three convex portions. Each annular colored line 13 includes 12 repetitions of this cycle. That is, the number of periods is 12. Although it does not specifically limit as a cycle number of each said cyclic | annular coloring line 13, 2 or more and 30 or less are preferable, and 12 or more and 24 or less are more preferable. By doing so, it is possible to reproduce a pattern closer to the human iris.

  The radius (r) of the circle inscribed in the inner annular colored line 13a is not particularly limited, but is preferably 3 mm to 7.5 mm, and more preferably 4 mm to 7 mm. When the radius (r) is less than 3 mm, the iris pattern 12 tends to overlap the pupil when worn, which may affect the visual field. On the other hand, when the radius (r) exceeds 7.5 mm, the iris pattern 12 is positioned too far outside, or a sufficient width cannot be secured, so that a natural iris pattern is sufficiently expressed. It may not be possible.

  The height of the convex portion of the inner (innermost) annular colored line 13a is not particularly limited, but is preferably 0.2 mm or more and 2.0 mm or less. Further, the height of the convex portion of the outer (outermost) annular colored line 13b is not particularly limited, but is preferably 0.5 mm or more and 3.0 mm or less. By using the annular colored line 13 having such a height, a more natural iris pattern can be reproduced. Note that the height of the convex portion of the annular colored line 13 is a difference in radius between a circle inscribed in the annular colored line 13 and a circle inscribed on the circle.

  The distance from the center (the center of the lens 15 and the center of each annular colored line 13) to the point on the shortest annular colored line 13 is r (matches the radius of the circle inscribed in the inner annular colored line 13a), and the lens radius ( When the difference (R−r) between R) and r is x (coincides with the width of the annular colored band 14), the innermost colored ring 13 (inner annular colored line 13a) is the same. It is preferably formed in a region surrounded by a circle having a center 15 and having a radius r and a circle having a radius r + 0.8x (see FIG. 2A). By arranging the annular colored line 13a in this way, a more natural iris pattern can be expressed.

  Further, the outermost ring coloring line 13 (outer ring coloring line 13b) at the outermost periphery is surrounded by a circle having the same center 15 and a radius of r + 0.15x and a circle having a radius of r + 0.95x. It is preferable that it is formed (refer FIG.2 (b)). By arranging the annular coloring line 13b and the annular coloring band 14 in such a relationship, a more natural iris pattern can be expressed.

  Although it does not specifically limit as a width | variety (line width) of each cyclic | annular coloring line 13, It is preferable that the width | variety of the outer cyclic | annular coloring line 13b differs from the width | variety of the inner cyclic | annular coloring line 13a. Thus, a more natural iris pattern can be expressed by changing the width of the plurality of annular colored lines. In this case, it is more preferable that the width of the outermost annular colored line is larger than the width of the other annular colored lines. Further, in order to obtain a more natural iris pattern, the interval between the annular colored lines 13 is appropriately adjusted together with the width of each annular colored line 13 or independently of the width.

  As a specific width of the inner colored ring line 13a (other annular colored line), for example, it can be set to 0.05 mm or more and 2 mm or less. The width of the outer annular colored line 13b (the outermost annular colored line) is preferably 0.2 mm or more and 2.5 mm or less, and more preferably 0.5 mm or more and 2 mm or less. By setting the line width in such a range, a more natural iris pattern can be expressed.

  The color of each of the annular colored lines 13 is not particularly limited, and may be, for example, a chromatic color such as brown, green, or blue, or an achromatic color such as black or gray, so that the original iris color can be reproduced. it can. Moreover, the color of each annular colored line may be the same or different, and a plurality of colors may be applied to one annular colored line.

  It is preferable that the color, density, or luminance of the annular colored line 13 changes continuously or discontinuously. By forming the annular colored line 13 in this way, a more natural iris pattern can be expressed. In addition, by changing the color, density, or luminance of the annular colored line 13 in this way, it is possible to easily adjust the impression of the iris pattern.

  Among the changes in color, density, or luminance in the annular colored line 13, it is preferable to reduce the density outward, that is, add gradation. By adding such a gradation, a more natural iris pattern can be expressed. This change in color, density or brightness (decrease in density in the outward direction, etc.) may be changed in each annular coloring line, or the density of each annular coloring line does not change, and each annular coloring is changed. You may change between lines.

  The annular colored band 14 is provided so that the outer edge is formed outside the outer (outermost circumferential) annular colored line 13b. The outer edge of the annular colored band 14 is substantially circular. The annular colored band 14 represents a limbal ring that is an outer edge of a black eye. Therefore, a more natural iris pattern can be expressed when the iris pattern 12 includes such an annular colored band 14. Further, the contact lens 10 can make the outer diameter of the black eye large and clarify the outer edge clearly.

  The inner edge of the annular colored band 14 coincides with the inner annular colored line 13a. By doing in this way, an iris pattern can be emphasized, such as an annular colored band (limbal ring) being emphasized.

  That is, the inner diameter of the annular colored band 14 matches the radius (r) of the circle inscribed in the inner annular colored line 13a.

  The outer diameter of the annular colored band 14 is preferably 3.1 mm or greater and 7.5 mm or less. When the outer diameter (R) is less than 3.1 mm, it becomes difficult to form the annular colored band 14 having a sufficient width. On the other hand, if the outer diameter (R) is larger than 7.5 mm, the white area located on the outer peripheral side of the limbal ring is too small without being covered with the annular colored band 14 (limbal ring). In such a case, there is a possibility that the enhancement effect by the annular colored band 14 will be insufficient, and it will be unnatural, or it will be difficult to achieve the desired effect of improving the beauty of the eye.

  The outer edge of the annular colored band 14 may coincide with the outer edge of the contact lens 10, but may be smaller than the outer edge of the contact lens 10. That is, the outer diameter of the annular colored band 14 can be made smaller than the radius (R) of the contact lens 10. By doing in this way, it becomes possible to set the outer diameter of the annular colored band 14 with a large degree of freedom regardless of the size of the contact lens 10.

  Although it does not specifically limit as the width | variety (difference of an outer diameter and an internal diameter) of the cyclic | annular colored belt | band | zone 14, 0.1 mm or more and 4.5 mm or less are preferable, and 0.5 mm or more and 2.5 mm or less are more preferable. By setting the width to 0.1 mm or more, it is possible to improve the cosmetic effect such as making the black eye look larger. On the other hand, by setting it to 4.5 mm or less, it is possible to effectively prevent the limbal ring from becoming unnatural in appearance.

  Although it does not specifically limit as a color of the cyclic | annular coloring band 14, It is preferable that it is a color different from the cyclic | annular coloring line 13. FIG. By configuring the annular coloring line 13 and the annular coloring band 14 with different colors, a more natural iris pattern can be expressed, and each pattern is emphasized.

  The color of the annular colored band 14 is preferably black or brown so as to naturally express human black eyes. The hue of the annular colored band 14 is grasped by the Munsell color system, for example. Specifically, in the Munsell hue circle, a total of five (R, YR, Y, GY, G, BG, B, PB, P, RP) hues are provided in the middle of each of the five basic colors. , It is preferable that the hue is YR and the lightness is 0 or more and 5 or less as the black or brown system. Further, colors including G or B (GY, G, BG, B, PB) are also preferable, and these dark colors are more preferable.

  The annular colored band 14 can be formed with a dot pattern composed of a plurality of colored dots. Further, the annular colored band 14 may be formed by solid coating instead of dots.

  The annular colored band 14 can have the same concentration in the entire region, but the concentration in the outer peripheral portion may be decreased from the inner peripheral side to the outer peripheral side. Moreover, you may provide the area | region where the density | concentration was made constant by the radial direction predetermined width | variety in the inner peripheral part of the cyclic | annular coloring band 14. By coloring the annular coloring band 14 at such a concentration, a more natural-looking limbal can be expressed. The change in density of the annular colored band 14 can be adjusted by changing the size, number density, and density of the dots themselves.

  The method for manufacturing the contact lens 10 is not particularly limited. For example, the iris pattern 12 may be colored on the surface of the contact lens base 11 by a known method. Examples of the coloring method of the iris pattern 12 include photographic printing, screen printing, pad printing, ink jet printing, and the like, addition of a monomer when forming a contact lens base material, and other hand-drawn methods. Among these, in consideration of the spherical surface of the lens substrate 11, mass productivity, coloring accuracy, color reproducibility, and the like, printing is preferable, and pad printing or inkjet printing is more preferable.

  As a method using pad printing, for example, after filling a dot pattern formed by etching treatment on a metal plate with a colorant, the dot pattern colorant is transferred using a silicon pad, and the contact lens base material 11 is transferred. The dot pattern colorant is transferred.

  Ink jet printing uses a piezo element or the like as an actuator to blow out a colorant from a large number of minute nozzles and directly attach it to the surface of the contact lens substrate 11 that becomes a colored surface. Such ink jet printing is particularly suitable because it does not require pressing of a pad or the like to the contact lens substrate, and fine dots can be formed with high accuracy.

  In addition, as a manufacturing method other than the above method, a method of arranging the iris pattern 12 as a colored layer between the front and back surfaces of the contact lens substrate 11 can be mentioned. As a specific method, there is a method in which a colored layer is provided on the surface of the half layer on the front surface or the back surface side, and the remaining half layer is adhered. By doing so, it is possible to obtain a contact lens having a laminated structure in which a transparent layer is provided on each side of the colored layer. The colored layer can be formed by printing as described above, or can be formed as a colored resin layer using a colored molding monomer in which a colorant is dissolved. In addition, although it depends on the forming method of the colored layer, translucency, etc., when employing a laminated structure composed of at least one colored layer and a transparent layer, the thickness of each transparent layer is set to 5 μm to 300 μm. In addition, the thickness of each colored layer is preferably 0.2 μm to 100 μm. In particular, when a printing layer by pad printing, ink jet printing or the like is adopted as the colored layer, it is preferable that the thickness of the printing layer is set smaller than the transparent layer.

(Second embodiment)
The iris pattern 22 shown in FIG. 3 as the second embodiment does not have a colored annular band, and consists only of double annular colored lines 23a and 23b. As described above, the contact lens including the iris pattern 22 including only the annular colored line can also reproduce the human iris pattern satisfactorily.

(Third embodiment)
The double annular colored lines 33 (33a and 33b) shown in FIG. 4 as the third embodiment are each composed of discontinuous zigzag lines. That is, the density of each annular colored line 33 (33a and 33b) changes discontinuously in the circumferential direction. In addition to the density, the color and brightness may be changed discontinuously. By forming an annular colored line in this way, a more natural iris pattern can be expressed, and by adjusting the color, density, or brightness in this way, it is easy to adjust the impression of the iris pattern, etc. Can be done. 4 represents only the annular colored line 33, it can be an iris pattern combined with an annular colored band (limbal ring).

(Other embodiments)
The contact lens of the present invention is not limited to the above embodiment. For example, in the contact lens of the present invention, the iris pattern may be composed of triple or more annular colored lines. The iris pattern may not have an annular colored band. The annular colored band may be provided so as to extend to the inside of the innermost periphery. Moreover, if the distance from a center is not constant, the cyclic | annular coloring line may be a shape which does not have periodicity, and the shape (non-similar shape) from which several cyclic | annular coloring lines differ may be sufficient. As described above, the impression of the iris pattern or the like can be adjusted by changing the number or shape of the annular colored lines.

  In addition, in the contact lens of the present invention, the iris pattern may include a pattern other than the annular colored line and the annular colored band, or a pattern other than the iris pattern may be attached to the contact lens.

  As described above, the contact lens of the present invention can express a natural iris pattern and can easily adjust the impression and the like of the iris pattern. Therefore, the contact lens can be suitably used for cosmetic applications.

DESCRIPTION OF SYMBOLS 10 Contact lens 11 Contact lens base material 12, 22 Iris pattern 13, 13a, 13b, 23a, 23b, 33, 33a, 33b Annular colored line 14 Annular colored band 15 Center

Claims (12)

A contact lens having an iris pattern,
A contact lens, wherein the iris pattern comprises double or more annular colored lines whose distance from the center is not constant.   The contact lens according to claim 1, wherein the plurality of annular colored lines are substantially similar to each other.   The contact lens according to claim 1 or 2, wherein the color, density or luminance of the annular colored line changes continuously or discontinuously within one annular colored line or between a plurality of annular colored lines. .   The contact lens according to claim 3, wherein the change is a decrease in density outward or a change in circumferential direction.   The contact lens according to any one of claims 1 to 4, wherein a width of the annular colored line on the outermost periphery is 0.2 mm or more and 2.5 mm or less.   The contact lens according to claim 1, wherein the plurality of annular colored lines have different widths.   The contact lens according to claim 1, wherein the distance from the center of each annular colored line changes periodically. One cycle of each of the annular colored lines consists of random zigzag lines,
The contact lens according to claim 7, wherein the number of periods of each annular colored line is 2 or more and 30 or less. The iris pattern further comprises an annular colored band,
The contact lens according to any one of claims 1 to 8, wherein an outer edge of the annular colored band is a substantially circular shape formed outside the annular colored line on the outermost periphery. When the distance from the center of the annular colored line to the point on the shortest annular colored line is r, and the difference (R−r) between the radius (R) of the lens and the r is x,
10. The outermost annular colored line is formed in a region surrounded by a circle having the same center and a radius of r + 0.15x and a circle having a radius of r + 0.95x. Contact lens of any one of these. When the distance from the center of the annular colored line to the point on the shortest annular colored line is r, and the difference (R−r) between the radius (R) of the lens and the r is x,
The innermost colored ring line is formed in a region surrounded by a circle having the same center and a radius of r and a circle having a radius of r + 0.8x. The contact lens of any one. The contact lens according to claim 9, wherein the inner edge of the annular colored band is an innermost annular colored line.

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