JP2014074866A - Contact lens and contact lens manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contact lens on which a pattern looking natural and three-dimensional when viewed from a front side by a third person is applied, and to provide a contact lens manufacturing method that can attain the contact lens without undergoing a complex process.SOLUTION: The present invention relates to a contact lens that includes an expansion/reduction pattern composed of a shape having a predetermined shape expanded or reduced in at least one direction of a radial direction and a circumferential direction. It is preferable that a direction of the expansion and reduction is the radial direction and an expansion/reduction rate of the pattern in the radial direction is greater than that in the circumferential direction. Further, a contact lens manufacturing method according to the present invention includes a step of forming the expansion/reduction pattern composed of the shape having the predetermined shape expanded or reduced on a contact lens blank surface.

Description

  The present invention relates to a contact lens having a pattern and a method for manufacturing the contact lens.

  Contact lenses with patterns by coloring are used for cosmetics, medical use, and cosmetics, etc. Others are colored to facilitate handling of contact lenses for vision correction, etc. It also has a function. For example, as shown in FIG. 6, a contact lens 40 in which a plurality of patterns 42 are formed on the surface peripheral portion of the contact lens base material 41 has been developed (Japanese Patent Laid-Open Nos. 2001-311915 and 2001-31916). Publication). However, when a third person views the person wearing the contact lens 40 from the front, the contact lens base material 41 and the curvature of the eyeball cause the pattern 42 applied to the peripheral portion to be crushed and appear unnatural. .

  On the other hand, as a contact lens that expresses a sense of depth, a contact lens having a layer structure of at least three layers in which colored layers and transparent layers are alternately arranged has been developed (see Japanese Patent Application Publication No. 2010-529505). However, since the contact lens having such a multilayer structure is manufactured by laminating each layer, the manufacturing process becomes complicated and the manufacturing cost increases.

JP 2001-311915 A JP 2001-311916 A Special table 2010-529505 gazette

  The present invention has been made on the basis of the above-described circumstances, and when a third party sees from the front, the contact lens provided with a pattern that looks natural or three-dimensional, and a complicated process. It aims at providing the manufacturing method which can obtain such a contact lens, without.

The invention made to solve the above problems is
It is a contact lens having a stretchable pattern having a shape obtained by extending or reducing a predetermined shape in at least one of a radial direction and a circumferential direction.

  The contact lens has a stretchable pattern having a shape obtained by extending or reducing a predetermined shape as described above. Therefore, when a third person sees a person wearing the contact lens from the front, for example, the shape that is expanded in the radial direction or reduced in the circumferential direction is corrected by the curvature of the contact lens, and the pattern is naturally or three-dimensionally Can be visually recognized. Moreover, the shape extended in the circumferential direction or reduced in the radial direction is visually recognized as a more crushed shape, that is, a shape with a sense of depth, due to the curvature of the contact lens. Note that the expansion and contraction directions are a radial direction, a circumferential direction, and a direction of the combination based on the lens center of the contact lens. Further, since such a pattern can be provided relatively easily by printing on the surface of the contact lens substrate, this pattern can be applied without going through a complicated manufacturing process.

  The expansion / contraction direction is preferably a radial direction. By having a stretchable pattern stretched (more preferably stretched) in the radial direction, a three-dimensional effect can be expressed more effectively.

  The expansion / contraction ratio in the radial direction of the expansion / contraction pattern is preferably larger than the expansion / contraction ratio in the circumferential direction. The stretch pattern thus contracted (stretched or contracted) is visually recognized as a more natural or three-dimensional pattern from the front.

  It is preferable to further have a pattern other than the stretchable pattern. When this other pattern is a basic pattern before expansion or contraction of the expansion / contraction pattern, the expansion / contraction pattern may be formed outside the other pattern with the lens center as a reference. Moreover, it is also preferable that the said elastic pattern is formed along with the radial direction. By arranging the stretchable pattern in this way, the stereoscopic effect of the stretchable pattern can be further enhanced.

  It is preferable that the stretch ratio of the stretch pattern is 50% or more and 500% or less. By setting the expansion rate within this range, a more natural or three-dimensional pattern in front view can be expressed. The expansion / contraction rate is more preferably 70% or more and 300% or less, and further preferably 101% or more and 250% or less.

  The stretchable pattern is preferably composed of one or a plurality of colored dots. Thus, the expansion / contraction rate of this expansion / contraction pattern can be easily adjusted because the expansion / contraction pattern consists of colored dots.

  The stretchable pattern may be formed in an annular region centered on the lens center. In this way, by forming the stretchable pattern in the annular region, a natural impression or a three-dimensional effect can be imparted by utilizing the curvature of the lens and the stretchable pattern.

  It is preferable that the radius of the inner edge of the annular region is 2.0 mm to 5.5 mm and the radius of the outer edge is 5.0 mm to 7.5 mm. By making the said cyclic | annular area | region into such a size, visibility is not prevented and more natural impression or a three-dimensional effect can be provided to the said expansion-contraction pattern.

  The contact lens may further include an annular colored band. The annular colored band represents a limbal ring that is the outer edge of a black eye. Therefore, when the contact lens has such an annular colored band, a more natural pattern can be expressed.

  The manufacturing method of the contact lens of this invention has the process of forming the expansion / contraction pattern which consists of the shape which extended or reduced the predetermined shape on the contact lens base-material surface. According to this manufacturing method, it is possible to obtain a contact lens with a pattern that looks natural or stereoscopic when viewed from the front by a third party in a relatively easy process.

  Here, “length” in the present invention refers to the length along the curved surface of the lens surface. The “stretch rate” refers to the length of the stretchable pattern with respect to the length of the original predetermined shape in one direction when an arbitrary predetermined shape is extended or reduced in one direction to obtain a stretchable pattern.

  As described above, the contact lens of the present invention is preferably used for cosmetics and the like because the applied pattern has a natural impression and stereoscopic effect when the person wearing the contact lens is viewed from the front. Can do. Moreover, according to the contact lens manufacturing method of the present invention, a contact lens having such a pattern can be obtained without going through a complicated manufacturing process.

It is a typical sectional view showing a first embodiment of a contact lens of the present invention. It is a schematic diagram which shows the expansion-contraction pattern attached | subjected to the contact lens of FIG. FIG. 2 is a schematic plan view showing the contact lens of FIG. 1. It is a typical top view which shows 2nd embodiment of the contact lens of this invention. It is a typical top view which shows 3rd embodiment of the contact lens of this invention. It is a typical top view which shows the conventional contact lens.

  Hereinafter, embodiments of a contact lens and a manufacturing method thereof according to the present invention will be described in detail with reference to the drawings as appropriate.

<Contact Lens>
(First embodiment)
The contact lens 10 shown in FIGS. 1 and 3 includes a contact lens base material 11 and a stretchable 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 stretchable pattern 12 is composed of a plurality of colored dots. Each colored dot (stretchable pattern 12) has a substantially heart shape obtained by extending a predetermined shape (basic heart shape 14), as will be described in detail later. In the first embodiment, the predetermined shape is extended, but may be reduced.

  The stretchable pattern 12 (a plurality of colored dots) is formed in an annular region centered on the lens center 13. In this way, by forming the stretchable pattern 12 in the annular region, it is possible to make use of the curvature of the contact lens surface and to give the stretchable pattern 12 a natural impression or a three-dimensional effect. Further, by forming the stretchable pattern 12 in the annular region, it is possible to suppress the hindrance to the visual field when it is attached.

  The contact lens 10 may further have a pattern (not shown) other than the stretchable pattern 12. The other pattern is not particularly limited, and for example, the shape is a heart shape 14 which is a basic pattern before expansion or contraction of the stretchable pattern 12, or a star shape which is not related to the basic pattern, and the like. The position can also be set independently of the stretchable pattern 12. However, as another pattern, a basic pattern before expansion or contraction of the stretchable pattern 12 is preferable, and the stretchable pattern 12 is formed on the outer side (periphery side) of the other pattern with the lens center 13 as a reference. preferable. By arranging the stretchable pattern in this way, the stereoscopic effect of the stretchable pattern can be further enhanced.

  The radius (inner diameter: r in FIG. 3) of the inner edge of the annular region is not particularly limited, but is preferably 2.0 mm or more and 5.5 mm or less, and more preferably 3.5 mm or more and 5.0 mm or less. When the radius (r) is less than the lower limit, the annular region (the stretchable pattern 12) is likely to overlap the pupil when worn, which may affect the field of view. On the other hand, when the radius (r) exceeds the upper limit, the annular region (stretchable pattern 12) is too much on the outside or a sufficient width cannot be secured. It may not be possible to form. Here, the inner edge of the annular region is a circle inscribed in the innermost stretchable pattern 12 (colored dot) and centered on the lens center 13.

  The radius (outer diameter: R in FIG. 3) of the outer edge of the annular region is not particularly limited, but is preferably 5.0 mm or more and 7.5 mm or less, and more preferably 4.5 mm or more and 7.0 mm or less. By setting the outer diameter of the annular region within the above range, an annular region having a sufficient width can be secured, and the stretchable pattern 12 can be formed in the region. The outer edge of the annular region is a circle that circumscribes the outermost stretchable pattern 12 (colored dots) and that has the lens center 13 as the center.

  The stretchable pattern 12 (colored dots) may be provided up to the outer edge of the contact lens base material 11, but in the present embodiment, the outer edge of the stretchable pattern 12 (colored dots) is the contact lens base material 11. It is provided inside the outer edge. That is, the outer edge portion of the contact lens 10 is a non-colored region where the stretchable pattern 12 is not attached.

  When the contact lens 10 is used as a vision correction contact lens, it is preferable to form the stretchable pattern 12 on the outer side of the central portion having optical characteristics.

  The stretchable pattern 12 includes a plurality of colored dots having a substantially heart shape. The plurality of colored dots (stretchable pattern 12) are arranged on a double concentric circle. Specifically, eight colored dots (expandable pattern 12a) are arranged at equal intervals on the inner concentric circle, and eight colored dots (expandable pattern 12b) are arranged at equal intervals on the outer concentric circle. In addition, the stretchable patterns 12 are arranged in a radial pattern with two in the radial direction around the lens center 13. By arranging the stretchable patterns radially in this way, the stereoscopic effect of the stretchable patterns 12 can be further enhanced. Note that the number of the colored dots is not limited, and the number of colored dots in the radial direction (the number of concentric circles in which the colored dots are arranged) can be, for example, 2 or more and 20 or less.

  As shown in FIG. 2, each of the stretchable patterns 12 has a shape obtained by extending a basic heart shape 14 (predetermined shape). The extension direction is a radial direction centered on the lens center 13. Since the stretchable pattern 12 has such an extended shape, when the third person sees the person wearing the contact lens 10 from the front, the extended shape is corrected by the curvature of the contact lens. Can be visually recognized naturally or three-dimensionally (see FIGS. 1 and 3).

  The stretch rate of these stretch patterns 12 is preferably 50% or more and 500% or less, more preferably 70% or more and 300% or less, and even more preferably 101% or more and 250% or less in both the radial direction and the circumferential direction ( However, 100% is excluded). For example, by setting the expansion / contraction ratio in the radial direction within the above range, a more natural or three-dimensional pattern in front view can be expressed. Note that a three-dimensional effect (impression that pops out) can be expressed by increasing the expansion / contraction rate in the radial direction. Moreover, moderate depth feeling etc. can be expressed by making the expansion-contraction rate of the circumferential direction into the said range. Here, the expansion / contraction rate is the length of the stretchable pattern 12 stretched (stretched or shrunk) with respect to the length (H in FIG. 2) of a predetermined shape (basic heart shape 14) in the stretched (stretched or shrunk) direction. (H1 or H2 in FIG. 2).

  The expansion / contraction ratio of the outer expansion / contraction pattern 12b is larger than the expansion / contraction ratio of the inner expansion / contraction pattern 12a. By increasing the expansion ratio of the outer stretchable pattern 12b in this way, each stretchable pattern 12 can express a natural shape in front view.

  The stretch rate (H1 / H) of the innermost stretchable pattern 12a is preferably 101% or more and 200% or less. Moreover, as an expansion / contraction rate (H2 / H) of the outermost elastic pattern 12b, 101% or more and 500% or less are preferable. Further, the expansion ratio (H2 / H) of the outermost stretch pattern 12b relative to the stretch ratio (H1 / H) of the innermost stretch pattern 12a, that is, H2 / H1, is preferably 101% or more and 250% or less. By increasing the expansion / contraction rate of the stretchable pattern 12 toward the outside at such a ratio, a more natural shape or the like can be brought out.

  Each stretchable pattern 12 may be extended or reduced in the circumferential direction with respect to the basic heart shape 14 (predetermined shape). Moreover, it does not need to be extended or reduced in the circumferential direction from the viewpoint of design. However, when the stretchable pattern 12 is extended or reduced in the radial direction and the circumferential direction, the stretch rate in the radial direction is larger than the stretch rate in the circumferential direction. The stretch pattern stretched in this way is visually recognized as a more natural or three-dimensional pattern from the front.

  Although it does not specifically limit as a magnitude | size of the colored dot which comprises each pattern 12, As a length of radial direction, 0.1 mm or more and 5.0 mm or less are preferable.

  In the contact lens 10 of FIGS. 1 to 3, one basic heart shape 14 is extended in the radial direction at an expansion / contraction rate corresponding to the distance from the lens center 13 to form the expansion / contraction patterns 12 a and 12 b. In this way, when viewed from the front, each stretchable pattern 12 is visually recognized as a pattern having substantially the same shape and the same size.

  Further, like the contact lens 10, a plurality of stretch patterns 12 may be arranged on a plurality (two in the contact lens 10) concentric circles, and the stretch rate may be set for each stretch pattern arranged in each concentric circle. By doing in this way, the range of expression can be expanded, for example, the pattern which becomes the impression of a natural shape, and the pattern with a three-dimensional effect can be arrange | positioned cyclically | annularly.

  A plurality of shapes or sizes may be used as the basic shape (predetermined shape). In this way, various patterns can be expressed. For example, the size of the stretchable pattern may be adjusted so that the pattern looks small or large along the radial direction. By doing in this way, a perspective feeling, a three-dimensional feeling, etc. can also be expressed by a some expansion-contraction pattern.

  The plurality of stretchable patterns 12 are colored, but may be achromatic or chromatic. In addition, if it is a chromatic color, the effect for cosmetics can be heightened. Each stretchable pattern 12 may be colored in the entire region, or may be colored only in the outer edge.

  The stretchable pattern 12 is usually formed of a colorant. The colorant is not particularly limited, and those containing known dyes and pigments are used. This colorant contains a solvent, a curing agent, a surfactant and the like as appropriate in addition to the coloring component of the dye or pigment.

  The plurality of stretchable patterns 12 may be composed of colored dots of the same color or may be composed of colored dots of different colors. When the plurality of colored dots are composed of colored dots of a plurality of different colors, it is preferable to color the hue, saturation, or lightness so as to change continuously or discontinuously. For example, by continuously changing in the radial direction or the circumferential direction, in addition to the expansion / contraction rate of the expansion / contraction pattern (colored dots), a depth feeling or the like can be effectively imparted to the expansion / contraction pattern 12 by the color change.

  The change in color of the stretchable pattern 12 (colored dots) may be a change in density in the radial direction (such as a decrease toward the outside). In this way, a more three-dimensional pattern can be expressed. It is also preferable that the color change of the stretchable pattern 12 (colored dots) is a change in density in the circumferential direction. Even in this way, a three-dimensional pattern can be expressed.

  The contact lens 10 has a stretchable pattern 12 having a shape obtained by extending a predetermined shape (basic heart shape 14) in the radial direction as described above. Therefore, when a third person views the person wearing the contact lens 10 from the front, the extended shape is corrected by the curvature of the contact lens 10, and the pattern can be visually recognized naturally or stereoscopically. Moreover, since such a stretchable pattern 12 can be provided relatively easily by printing or the like on the surface of the contact lens substrate 11, this pattern 12 can be applied without going through a complicated manufacturing process.

(Second embodiment)
The contact lens 20 of FIG. 4 has a contact lens base material 11, and a stretchable pattern 12 and another pattern 15 applied to the surface of the contact lens base material 11. Since the contact lens substrate 11 and the stretchable pattern 12 are the same as those of the contact lens 10 in FIG.

  The other pattern 15 has a basic heart shape that is not extended or reduced. The eight other patterns 15 are arranged at equal intervals in the annular region. Specifically, each other pattern 15 is arranged between each stretchable pattern 12b.

  In the contact lens 20, the stretchable pattern 12 having the shape thus extended and the other pattern 15 that is not extended are formed on the surface of the substrate 11. In the front view of the contact lens 20, the other pattern 15 looks like a collapsed shape, and the stretchable pattern 12 looks like a natural shape that is not collapsed. By arranging a plurality of patterns so as to combine the collapsed shape and the uncrushed shape in this way, a stereoscopic effect or the like can be imparted to the pattern as a whole.

(Third embodiment)
The contact lens 30 in FIG. 5 includes a contact lens base material 11, a stretchable pattern 12 applied to the surface of the contact lens base material 11, and an annular colored band 36. Since the contact lens substrate 11 and the stretchable pattern 12 are the same as those of the contact lens 10 in FIG.

  The annular colored band 36 is provided in an annular shape centered on the lens center 13. Both the outer edge and the inner edge of the annular colored band 36 are substantially circular. The annular colored band 36 expresses a limbal ring that is an outer edge of a black eye. Therefore, when the contact lens 30 includes such an annular colored band 36, a more natural pattern can be expressed. Further, the contact lens 30 can make the outer diameter of the black eye large and clarify the outer edge clearly.

  Note that, among the stretchable patterns 12, the stretchable patterns 12 a disposed on the inner side are located inside the annular colored band 36. On the other hand, the stretchable pattern 12 disposed on the outside is disposed on the annular colored band 36. However, the positional relationship between the stretchable pattern and the annular colored band is not limited to this, and may not overlap at all, or all may overlap.

  The color of the annular colored band 36 is not particularly limited, but is preferably a color different from the stretchable pattern 12. By configuring the stretchable pattern 12 and the annular colored band 36 with different colors, each pattern is more emphasized. Specifically, the color of the annular colored band 36 is preferably black or brown so as to naturally express human black eyes.

  The annular colored band 36 can have the same color, luminance and density throughout the entire area, or can be colored by changing. For example, the density of 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 annular coloring belt | band | zone 36. FIG. By coloring the annular coloring band 36 at such a concentration, a more natural-looking limbal can be expressed.

(Other embodiments)
The contact lens of the present invention is not limited to the above embodiment. For example, the shape (predetermined shape) of the colored dots is not limited to the heart shape. In addition, examples of the shape of the colored dots include a circle, a wedge, a heart, a floral pattern, and a star shape. By setting it as these shapes, fashionability etc. can be provided to a pattern.

  The stretch pattern composed of the extended or reduced shape is not limited to the dot shape, and may be, for example, a character or the like. The stretchable pattern may not be formed in the annular region centered on the lens center, and may not be formed on a plurality of concentric circles centered on the lens center. Furthermore, the expansion / contraction direction of the predetermined shape may be any of a radial direction, a circumferential direction, or a combination thereof. If the stretchable pattern has a shape obtained by extending or reducing a predetermined shape, for example, it may be randomly formed on the surface of the lens substrate. Even in such a case, the pattern having such a shape can express a natural or three-dimensional shape when viewed from the front.

<Contact lens manufacturing method>
The method for producing the contact lens is not particularly limited, and for example, a method including a step of forming an extended pattern having a shape obtained by extending or reducing a predetermined shape on the surface of the contact lens substrate can be employed. According to this manufacturing method, it is possible to obtain a contact lens with a pattern that looks natural or stereoscopic when viewed from the front by a third party in a relatively easy process.

  Examples of the method for forming the stretchable pattern include printing such as photographic printing, screen printing, pad printing, and ink jet printing, 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, mass productivity, coloring accuracy, color reproducibility, and the like, printing is preferable, pad printing or inkjet printing is more preferable, and inkjet printing is particularly preferable. For example, in a two-dimensional plate or electronic data, a contracted pattern can be obtained by extending or reducing a predetermined predetermined shape in at least one of the radial direction and the circumferential direction.

  As a method of 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, , By transferring the colorant of the dot pattern.

  Ink jet printing uses a piezo element or the like as an actuator to eject a colorant from a large number of minute nozzles and directly adheres it to the surface of a contact lens base material to be 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, when performing inkjet printing, it is good to print the pattern of a predetermined shape (basic shape) from the normal direction in the lens center of a contact lens base material using the curved surface shape of a contact lens base material. By doing so, on the surface of the peripheral region other than the center of the lens, the colorant from the nozzle strikes obliquely, and a shape in which the predetermined shape extends in the radial direction around the center of the lens is printed.

  In addition, as a manufacturing method other than the above method, a method of arranging a dot pattern as a colored layer between the front and back surfaces of the contact lens base material 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.

  As described above, the contact lens of the present invention has a natural feeling and a three-dimensional feeling when the applied stretch pattern is viewed from the front, and therefore can be suitably used for cosmetics and the like.

10, 20, 30, 40 Contact lens 11, 41 Contact lens substrate 12, 12a, 12b Stretch pattern 13 Lens center 14 Heart shape 15 Other pattern 36 Annular colored belt

Claims (10)

  A contact lens having a stretchable pattern having a shape obtained by extending or reducing a predetermined shape in at least one of a radial direction and a circumferential direction.   The contact lens according to claim 1, wherein the direction of expansion and contraction is a radial direction.   The contact lens according to claim 1 or 2, wherein a stretch rate in a radial direction of the stretch pattern is larger than a stretch rate in a circumferential direction.   The contact lens according to claim 1, further comprising a pattern other than the stretchable pattern. The other pattern is a basic pattern before expansion or contraction of the stretch pattern,
The contact lens according to claim 4, wherein the stretchable pattern is formed on the outside of the other pattern with respect to the center of the lens.   The contact lens according to claim 1, wherein the stretchable pattern is formed side by side in the radial direction.   The contact lens according to any one of claims 1 to 6, wherein an expansion / contraction ratio of the expansion / contraction pattern is 50% or more and 500% or less.   The contact lens according to claim 1, wherein the stretchable pattern is formed in an annular region centered on the lens center.   The contact lens according to claim 1, further comprising an annular colored band. A method for producing a contact lens, comprising: forming a stretchable pattern having a shape obtained by extending or reducing a predetermined shape on a surface of a contact lens substrate.

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