JP2019207443A - Color contact lens - Google Patents

Abstract

To provide a color contact lens with which it is possible to obtain natural beautiful appearance.SOLUTION: Provided is a color contact lens 2, comprising: a bordering colored part 4 which is an annular colored area having tinted dots of a first color corresponding to the color of iris part of a wearer and which is arranged at a position for bordering the outer shape of the iris part; a transitional colored part 6 which is an annular colored area having tinted dots of the first color and which is arranged inside of the bordering colored area 4 in proximity thereto; and other colored parts (except an iris pattern) 10 arranged inside of the area of the transitional colored part 6 and the transitional colored part 6 and having tinted dots of a second color brighter than the first color. The tinted concentration of the transitional colored part 6 and the tinted concentration of the other colored parts 10 are distributed so as to progressively decrease as it goes from the outside to the inside in the radial direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a color contact lens that can change the color of an iris of a wearer.

  In recent years, color contact lenses that can change the color of the wearer's iris (black-eye portion) have become popular, especially among young women. Among them, a color contact lens having an annular colored band at the contour portion of the wearer's iris has been proposed. In such a color contact lens, the outline of the iris part can be clearly highlighted by the colored band, but conversely, this causes a problem of giving an artificial impression.

  In order to cope with this, it has an annular colored band that extends across the boundary between the iris part and the sclera part (white eye part) and extends from the inner peripheral side to the outer peripheral side. There has been proposed a color contact lens colored so as to reduce the color density (see, for example, Patent Document 1). The color contact lens described in Patent Document 1 has a coloring in which the color density decreases from the inner peripheral side toward the outer peripheral side in the outer shape region of the iris portion, so that a more natural and warm appearance can be given.

Japanese Patent No. 5688900

  When a color contact lens is worn, the end of the color contact lens is restrained by the upper and lower eyelids, and therefore, when the wearer moves his eyes, a deviation usually occurs between the eyeball and the color contact lens. In the color contact lens described in Patent Document 1, since the same color as the colored band is not applied to the inside of the colored band, the sclera part (white-eye part) located outside the iris part is colored by this shift. When it shifts to the inside of the band, it can be visually recognized from the outside, and an unnatural appearance is exhibited. In particular, when the width of the colored band in the radial direction is reduced in order to obtain a natural appearance of the iris portion when the color contact lens is mounted, the sclera portion (white eye portion) is easily exposed.

  The present disclosure has been made in view of the above-described problem, and can clearly show the wearer's iris (black eye) in a natural manner, and the eyeball and color caused by the eye movement of the wearer. An object of the present invention is to provide a color contact lens that can prevent the sclera from being visually recognized even if a deviation occurs between contact lenses and has a natural appearance.

In order to solve the above problems, in the color contact lens according to one aspect of the present invention,
An annular colored region having colored dots of a first color in the color of the wearer's iris, the border colored portion disposed at a position bordering the outer shape of the iris;
An annular colored region having colored dots, disposed adjacent to the inside of the border colored portion, and a transition colored portion connecting the border colored portion and a further inner region; and
With
The density of the colored dots in the border colored portion is within a certain range,
The density of the colored dots in the transition colored portion is distributed so as to decrease in the radial direction from the outside toward the inside.

  As described above, in the present disclosure, the rim coloring portion can clearly show the wearer's iris in a natural manner, and is arranged inside the rim coloring portion, so that the density of colored dots proceeds from the outside to the inside. The transition coloring portion that decreases as the eye wears, and even if there is a shift between the eyeball and the color contact lens due to the movement of the eye, the sclera portion (white eye portion) can be prevented from being visually recognized. In addition, a color contact lens having a natural appearance can be provided.

It is a top view showing typically a color contact lens concerning one embodiment of the present invention. It is a top view which shows typically the rim coloring part of the color contact lens shown in FIG. It is a top view which shows typically the transition coloring part of the color contact lens shown in FIG. It is side surface sectional drawing which shows typically a state at the time of mounting | wearing a color contact lens. It is side surface sectional drawing which shows the case where the conventional color contact lens is mounted | worn typically, Comprising: It is a figure which shows the case where the wearer is looking at the front. It is side surface sectional drawing which shows the case where the conventional color contact lens is mounted | worn typically, Comprising: It is a figure which shows the case where an eye is moved from the case shown to FIG. 5A. It is side surface sectional drawing which shows the case where the color contact lens shown in FIG. 1 is mounted | worn typically, Comprising: It is a figure which shows the case where the wearer is looking at the front. It is side surface sectional drawing which shows typically the case where the color contact lens shown in FIG. 1 is mounted | worn, Comprising: It is a figure which shows the case where an eye is moved from the case shown to FIG. 6A. FIG. 2 is a plan view schematically showing an edge coloring portion, a transition coloring portion, and an outer transition coloring portion of the color contact lens shown in FIG. 1. It is a graph which shows an example of distribution of the coloring density in a border coloring part, a transition coloring part, and an outside transition coloring part shown in FIG. It is a graph which shows the other example of distribution of the coloring density in the border coloring part, transition coloring part, and outer transition coloring part shown in FIG. It is a figure (photograph) which shows the comparative example by the conventional color contact lens, Comprising: It is a figure which shows the case where a wearer looks at the front. It is a figure (photograph) which shows the comparative example by the conventional color contact lens, Comprising: It is a figure which shows the case where a wearer looks at the left side. It is a figure (photograph) which shows the comparative example by the conventional color contact lens, Comprising: It is a figure which shows the case where a wearer looks at the right side. It is a figure (photograph) which shows the comparative example by the conventional color contact lens, Comprising: It is a figure which shows the case where a wearer looks at the upper side. It is a figure (photograph) which shows the comparative example by the conventional color contact lens, Comprising: It is a figure which shows the case where a wearer looks at the lower side. It is a figure (photograph) which shows the Example by the color contact lens of this invention, Comprising: It is a figure which shows the case where a wearer looks at the front. It is a figure (photograph) which shows the Example by the color contact lens of this invention, Comprising: It is a figure which shows the case where a wearer looks at the left side. It is a figure (photograph) which shows the Example by the color contact lens of this invention, Comprising: It is a figure which shows the case where a wearer looks at the right side. It is a figure (photograph) which shows the Example by the color contact lens of this invention, Comprising: It is a figure which shows the case where a wearer looks at the upper side. It is a figure (photograph) which shows the Example by the color contact lens of this invention, Comprising: It is a figure which shows the case where a wearer looks at the lower side.

Embodiments and examples for carrying out the present invention will be described below with reference to the drawings. The color contact lens described below is for embodying the technical idea of the present invention, and the present invention is not limited to the following unless otherwise specified.
In each drawing, members having the same function may be denoted by the same reference numerals. In view of the explanation of the main points or ease of understanding, the embodiments and examples may be shown for convenience, but partial replacement or combination of configurations shown in different embodiments and examples is possible. In the embodiments and examples to be described later, description of matters common to those described above is omitted, and only different points will be described. In particular, the same operation and effect of the same configuration will not be sequentially described for each embodiment or example. The size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation.

(Color contact lens according to one embodiment)
First, a color contact lens according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a plan view schematically showing a color contact lens according to one embodiment of the present invention. FIG. 2 is a plan view schematically showing an edge coloring portion of the color contact lens shown in FIG. FIG. 3 is a plan view schematically showing a transition coloring portion of the color contact lens shown in FIG. In FIG. 1, an arc is shown at the boundary position of each colored portion, but this is a line added to clearly show the boundary and is not drawn on the actual color contact lens 2.

  The color contact lens 2 according to this embodiment is formed by applying various colors to a soft contact lens with a degree or a soft contact lens without a degree. As a material for the soft contact lens, a gel-like synthetic polymer compound (hydrogel or the like) such as Poly-HEMA (polyhydroxyethyl methacrylate) or PVP (polyvinylpyrrolidone) can be used. However, the present invention is not limited to this, and any other soft contact lens material can be used.

The color contact lens 2 is provided with a border coloring portion 4 which is an annular coloring region arranged at a position bordering the outer shape of the iris portion (black eye portion) of the wearer. The rim coloring portion 4 has colored dots of a first color corresponding to the color of the wearer's iris portion. This first color can also be referred to as a border corresponding color or a contour corresponding color.
Further, a transition coloring portion 6 that is an annular coloring region is disposed adjacent to the inside of the rim coloring portion 4. The transition coloring portion 6 has a function of a transition region that connects the border coloring portion 6 and a further inner region. In the present embodiment, another colored portion 10 having a colored dot of a second color different from the first color is arranged in a region inside the transition colored portion 6.

  The transition coloring portion 6 can also have colored dots of the first color as with the border coloring portion 4. In this case, the border coloring portion 4 having the border effect can be gradually faded out from the border coloring portion 4 to the transition coloring portion 6. Moreover, the transition coloring part 6 can also have a colored dot of a color different from the first color. For example, the color of the transition coloring portion 6 can be changed to a color with a tone lower than that of the border coloring portion 4. In this case, a more natural appearance can be obtained from the border coloring portion 4 to the transition coloring portion 6.

  The outline coloring unit 4 can clearly show the outline of the iris or make it appear larger, and the other coloring unit 10 can make the iris appear brighter or change its color. Furthermore, the transition coloring portion 6 can connect the border coloring portion 4 and the other coloring portion 10 in a natural manner.

<Border coloring part 4>
The first color corresponding to the color of the iris part of the wearer is preferably a color that approximates the color of the iris part in order to produce an effect that makes the outer shape of the iris part of the wearer stand out. In addition, in order to make the outer shape of the iris part clearly stand out, a color slightly darker than the color of the iris part may be used. However, the first color is not limited to this, and for example, any other color for producing a design effect on the color of the iris part can be adopted.

For example, when the color of the iris part is dark brown, it is conceivable to use black or a color close to black as the first color. The first color can have a certain hue width within a range that the wearer recognizes as substantially the same color.
Regarding the coloring density of the rim coloring portion 4, the coloring density of the rim coloring portion 4 by the colored dots of the first color is within a certain range. Here, “within a certain range” means a range in which the wearer has the recognition that the wearer is colored with substantially the same intensity.

  The outline coloring part 4 can clearly show the outline of the wearer's iris part. In particular, when the width dimension in the radial direction of the rim coloring portion 4 is relatively narrow, the wearer's iris can be clearly shown in a natural manner. Further, by arranging the outer end portion of the rim coloring portion 4 slightly outside the outer end portion of the iris portion of the wearer, an effect of making the pupil look larger can be achieved.

<Transition coloring part 6>
In the present embodiment, colored dots of the first color are also arranged in the transition coloring portion 6. However, the color of the colored dots arranged in the transition colored part 6 may not be exactly the same as the color of the colored dots arranged in the border colored part 4 within the certain range of the hue. Furthermore, it is possible to have colored dots of a color different from the first color.

  In the transition coloring unit 6 according to the present embodiment, as shown in FIG. 3, the color density due to the colored dots is distributed in the radial direction R so as to decrease from the outside toward the inside. Note that the color density of the colored dots is substantially the same in the circumferential direction. The color density and hue of human iris gradually change. Therefore, in the same manner, by gradually decreasing the color density from the near color density of the rim coloring portion 4, the outer rim coloring portion 4 and the other inner coloring portion 10 can be connected with a natural appearance. it can. In order to obtain such a natural appearance, it is preferable that the width dimension in the radial direction R of the transition colored portion 6 is larger than the width dimension in the radial direction of the border colored portion 4.

  When coloring similar to the border coloring portion 4 and the transition coloring portion 6 is performed, the border coloring portion 4 includes a region in which the coloring density is within a certain range, and a radial direction R adjacent to the inside of the region. It can also be expressed as having a region in which the color density decreases as it goes from the outside to the inside. In addition, the other effect by the transition coloring part 6 is described in detail later using FIG. 6A and 6B.

<Other coloring part 10>
As shown in FIG. 1, another colored portion 10 having a colored dot of a second color different from the first color is arranged inside the transition colored portion 6. The second color different from the first color can make the iris appear brighter by using a lighter color than the first color. It is also possible to change the color of the iris.

For example, when the first color is dark brown, light brown, yellow, red, blue, green, and gray colors can be employed. However, the present invention is not limited to this, and any other color can be adopted depending on the application and design. As the second color, not only one color but also a plurality of colors can be used. Moreover, the other coloring part 10 may have a colored dot of the 1st color. In that case, even the same color can be changed by changing the lightness and saturation.
The other colored portions 10 can draw not only the same colored dot pattern in the circumferential direction but also any pattern including a pattern that matches the iris and a pattern that improves the design of the color contact itself. .

The arrangement area of the other colored portions 10 will be described in more detail. In the present embodiment, not only the area inside the transition colored portion 6 but also the border colored portion 4 and the transition colored portion 6 are arranged. Thereby, a hue and coloring density can be changed gradually as it goes inward from the border coloring part 4. However, the present invention is not limited to this, and the arrangement region of the other colored portions 10 may be arranged in the transition colored portion 6 and the inner region thereof, or only in the inner region of the transition colored portion 6. It may be arranged.
That is, it can be said that the other colored portion 10 having the colored dots is disposed at least inside the transition colored portion 6.

  In the present embodiment, the coloring density of the other coloring portions 10 is distributed in the radial direction R so as to decrease from the outside toward the inside. In the human iris, the color density and hue gradually change. Similarly, by reducing the color density from the outside to the inside, a natural beautiful appearance can be obtained.

<Outer transition coloring part 8>
As shown in FIG. 1, in the color contact 2 according to the present embodiment, an outer transition coloring portion 8 that is an annular coloring region is disposed adjacent to the outer side of the rim coloring portion 4. The transition coloring portion 6 also has colored dots of the first color. However, this is not a limitation, and there may be colored dots of a color different from the first color.

In the radial direction R, the coloring density of the outer transition coloring portion 8 is distributed so as to decrease from the inside toward the outside. The human eyeball gradually changes from the iris to the sclera (white eye), and in the same way, by reducing the density of colored dots from the inside to the outside in the iris outline region, Can be obtained.
Since the iris and sclera portion (white eye portion) have considerably different hues, it is preferable that the width of the outer transition colored portion 8 is not so large. Therefore, as is apparent from FIG. 1, it is preferable that the width dimension of the transition colored portion 6 in the radial direction R is larger than the width dimension of the outer transition colored portion 8 in the radial direction R.

Here, the colored regions of the border coloring portion 4, the transition coloring portion 6, the outer transition coloring portion 8, and the other coloring portion 10 are colored with colored dots.
In a color contact lens colored with colored dots, the color density can be changed by changing the density of the colored dots. In this case, it is possible to change the density of colored dots by changing the number of colored dots per unit area using colored dots of the same size, and also to change the size of the colored dots themselves. Thus, the density of the colored dots can be changed. Furthermore, these can be used together to change the density of the colored dots.

As described above, the color density can be changed reliably and easily by changing the density of the colored dots. The density of the colored dots can be indicated by, for example, the ratio of the area of the colored dots to the area of the entire region where the colored dots are arranged. In order to obtain a natural appearance, the diameter of each colored dot is preferably about 5 to 200 μm.
In addition to changing the color density by changing the density of the color dots, the color density can also be changed using color dots having different color densities. As a result, it is possible to represent a subtle change in color density that is difficult to express only by a change in the density of the colored dots.

An example of a method of providing colored dots in each colored region is by pad printing. In pad printing, a pad having a dot pattern with ink is pressed against a contact lens and transferred. At this time, after transferring the colored dot pattern to one surface of the contact lens, the printed surface can be covered with the same contact lens material to form a sandwich color contact lens. The surface on which printing is performed may be a surface located outside at the time of mounting or a surface located inside.
However, the present invention is not limited to this, and the printing surface having a colored dot pattern may be exposed to the outside. Furthermore, any other printing method including ink jet printing can be adopted, and a color contact lens can be molded by dissolving a coloring material in a material.

(Problems with conventional color contact lenses)
Next, with reference to FIG. 4, FIG. 5A and FIG. 5B, a problem that occurs when the wearer moves the eyes in the conventional color contact lens will be described. FIG. 4 is a side cross-sectional view schematically showing a state when the color contact lens is mounted. FIG. 5A is a side cross-sectional view schematically showing a case where a conventional color contact lens is worn, and shows a case where the wearer is looking at the front. FIG. 5B is a side cross-sectional view schematically showing a case where a conventional color contact lens is mounted, and shows a case where the eye is moved from the case shown in FIG. 5A.

  As shown in FIG. 4, when the color contact lens 102 is attached to the eyeball B, the peripheral edge of the color contact lens 102 is restrained by the upper eyelid UL and the lower eyelid LL. Since tears exist between the color contact lens 102 and the eyeball B, when the wearer moves the eyeball B, a deviation occurs between the eyeball B and the color contact lens 102. In the color contact lens 2 according to the present invention described later, similarly, when the wearer moves the eyeball B, a deviation occurs between the eyeball and the color contact lens.

In the conventional color contact lens 102 shown in FIGS. 5A and 5B, a border coloring portion 104 having colored dots of a color corresponding to the iris portion I is arranged at a position that borders the outer shape of the iris portion I of the wearer. However, colored dots corresponding to the iris part I are not arranged in the inner area.
When the wearer shown in FIG. 5A is looking at the front, the position of the contour part of the iris part I and the position of the rim coloring part 104 coincide. Therefore, the outline coloring portion 104 can clearly show the outline of the iris portion I of the wearer.

On the other hand, as shown in FIG. 5B, when the eye is moved by an angle θ from the front view shown in FIG. 5A, the color contact lens 102 cannot follow the movement of the eyes, and between the eyeball B and the color contact lens 102. Deviation occurs.
For this reason, as shown by the white arrow of FIG. 5B, the sclera part (white eye part) W located outside the iris part I shown by the arrow X becomes visible from the outside. As a result, a region where the white color is missing is exposed in the iris part I, and an unnatural appearance is exhibited. In particular, the contrast of the sclera portion (white-eye portion) W adjacent to the iris portion I greatly changes the contrast from the iris portion I, so that it attracts other people's eyes and makes the sense of incongruity stand out.

  If the width of the rim coloring portion 104 is extended greatly inward, even if a deviation occurs between the eyeball B and the color contact lens 102, the sclera portion (white eye portion) can be prevented from being exposed to the outside. However, in that case, the width of the rim coloring portion 104 becomes too large, resulting in an unnatural artificial appearance.

(Solution of the problem by the present invention)
Next, it will be described with reference to FIGS. 6A and 6B that the above problem can be solved by the color contact lens 2 according to one embodiment of the present invention.
In the color contact lens 2, an edge coloring portion 4 having colored dots of a first color corresponding to the color of the iris portion I is disposed at a position where the outer shape of the iris portion I of the wearer is edged. Further, a transition coloring portion 6 having colored dots of the first color is disposed adjacent to the inside of the rim coloring portion 4. As schematically shown in FIGS. 6A and 6B, the coloring density of the transition coloring portion 6 is distributed so as to decrease from the outside toward the inside.

  When the wearer shown in FIG. 6A is looking at the front, the position of the outline of the iris part I and the position of the rim coloring part 4 are coincident, and the outline of the wearer's iris part I can be clearly shown. it can. In particular, when the width dimension in the radial direction of the rim coloring portion 4 is relatively narrow, the contour of the iris portion I of the wearer can be clearly shown in a more natural manner.

Next, as shown in FIG. 6B, when the eye is moved by an angle θ from the front view shown in FIG. 6A, a deviation occurs between the eyeball B and the color contact lens 2. However, the sclera portion (white eye portion) located outside the iris portion I indicated by the arrow Y in FIG. 6B is covered with the transition coloring portion 6. Therefore, as schematically shown by the colored arrows in FIG. 6B, it is possible to prevent the sclera portion (white eye portion) W from being exposed from the outside. In particular, since the contrast change with the iris part I is large and the portion adjacent to the iris part I of the sclera part (white eye part) that easily attracts other people's eyes is covered with a region having a high coloring density of the transition coloring part 6. It is possible to effectively prevent the sclera (white eye) W from being exposed. Therefore, even if the width dimension in the radial direction of the rim coloring portion 4 is made relatively narrow in order to clearly show the wearer's iris portion in a natural manner, the scleral portion (white-eye portion) W is exposed by the transition coloring portion 6. Can be prevented.
In the iris portion I, the color density and hue gradually change. Similarly, since the color density of the transition color portion 6 decreases from the outside to the inside, it is natural. Can give a good appearance.

  In particular, in order to effectively prevent the portion adjacent to the iris part I of the sclera part (white eye part) that easily attracts other people's eyes from being exposed, and to obtain a natural appearance, the border coloring part 4 to the transition coloring part 6 Thus, it is preferable that the coloring density is not continuously stepped, but decreases substantially continuously.

(Coloring concentration distribution of transition colored portion 6)
As described above, in order to prevent the sclera portion (white-eye portion) from being exposed even if a deviation occurs between the eyeball B and the color contact lens 2, the transition coloring portion 6 has a relatively high coloring density. Is more advantageous. On the other hand, if the color density of the transition colored portion 6 is too high, it becomes difficult to obtain a natural appearance of the iris portion I.
Based on the results of actual trials and tests of color contact lenses and various simulation results, we found the following for these conflicting events.

The color density can be represented by the density of colored dots having the same color density. In this case, the density of the colored dots can be indicated by the ratio of the area of the colored dots to the area of the entire area where the colored dots are arranged. .
At this time, the density of the colored dots near the outer end of the transition colored portion 6 is in the range of 50 to 80%, and the density of the colored dots near the inner end of the transition colored portion 6 is in the range of 0 to 10%. It has been found to be preferable. Furthermore, it turned out that the average value of the density of the colored dots of the entire transition colored portion 6 is preferably in the range of 25 to 45%, more preferably in the range of 25 to 35%. In particular, it is preferable that the density of colored dots continuously decreases from the border coloring portion 4 to the transition coloring portion 6.

  By having such a density of colored dots, it is possible to prevent the sclera (white eye) from being exposed even if a deviation occurs between the eyeball B and the color contact lens 2, and the iris I The color contact lens 2 with a natural appearance can be realized.

  Even when a deviation occurs between the eyeball B and the color contact lens 2, it is possible to prevent the sclera portion (white eye portion) from being exposed and to obtain a color contact lens 2 in which a natural appearance of the iris portion I is obtained. Therefore, it is preferable that the width dimension in the radial direction of the rim coloring portion 4 is 3 to 7% of the lens outer diameter dimension, and the width dimension in the radial direction of the transition coloring portion 6 is 6 to 10% of the lens outer diameter dimension. I found out.

In addition, in order to obtain the above effects, as the dimensions of each part of the color contact lens,
(1) The lens outer diameter is 13.5 to 15 mm,
(2) The diameter of the outer end portion of the outer transition colored portion 8 is 12.5 to 14.5 mm,
(3) The width dimension in the radial direction of the outer transition colored portion 8 is 0.1 to 0.3 mm,
(4) The width dimension in the radial direction of the rim coloring portion 4 is 0.3 to 1.0 mm, and (5) the width dimension in the radial direction of the transition coloring portion 6 is 0.5 to 1.8 mm. . Although there are individual differences in the size of the pupils, it is considered that many users can enjoy the above-described effects preferably within the above range.

(Color density distribution of the border coloring portion 4, the transition coloring portion 6, and the outer transition coloring portion 8)
Next, the color density distribution of the rim coloring portion 4, the transition coloring portion 6, and the outer transition coloring portion 8 will be described with reference to FIGS. 7, 8A, and 8B. FIG. 7 is a plan view schematically showing an edge coloring portion, a transition coloring portion, and an outer transition coloring portion of the color contact lens shown in FIG. FIG. 8A is a graph illustrating an example of a color density distribution in the border coloring portion, the transition coloring portion, and the outer transition coloring portion illustrated in FIG. 7. FIG. 8B is a graph showing another example of the distribution of the color density in the border coloring portion, the transition coloring portion, and the outer transition coloring portion shown in FIG. In the graphs shown in FIGS. 8A and 8B, the horizontal axis indicates the position in the radial direction R, and the vertical axis indicates the color density. The graphs shown in FIGS. 8A and 8B can be used as a reference profile for coloring with colored dots.

<Example shown in FIG. 8A>
In the example shown in FIG. 8A, the rim coloring portion 4 has substantially the same coloring density. In the transition coloring portion 6, the color density continuously decreases from the outer end B (that is, the inner end of the rim coloring portion 4) to the inner end A. In the outer transition coloring portion 8, the color density continuously decreases from the inner end C (that is, the outer end of the border coloring portion 4) to the outer end D.
In this case, it is preferable that the coloring density decreases substantially continuously from the border coloring portion 4 to the transition coloring portion 6. As a result, it is possible to effectively prevent the portion adjacent to the iris portion of the sclera portion (white eye portion) that easily catches the eyes of others and to obtain a natural appearance. Further, in order to obtain a natural appearance, it is preferable that the coloring density decreases substantially continuously from the rim coloring portion 4 to the outer transition coloring portion 8.

  In FIG. 8A, a linear graph in which the color density changes in proportion to the movement distance is shown. However, the present invention is not limited to this, and the color density varies with respect to the movement distance so as to draw a curved graph. May change. In this case, it is preferable to connect the transition coloring portion 6 and the outer transition coloring portion 8 with smooth curves at both ends B and C of the border coloring portion 4. In such a case, an arbitrary function including a polynomial function (n-order function) exponent / logarithm function, a trigonometric function, and a hyperbolic function can be used as a function indicating a curved graph.

<Example shown in FIG. 8B>
In the other example shown in FIG. 8B, the color density of the central portion M is high in the radial direction of the rim coloring portion 4 within a certain range in which the wearer recognizes that the coloring is substantially the same, and both ends B, C Has a low color density distribution. The central portion M here includes an arbitrary position between both end portions of the rim coloring portion 4, and may be a substantially central position or close to one of the end portions.

As is apparent from FIG. 8B, in the radial direction R, as the color proceeds from the end A on the inner side of the transition coloring portion 6 to the center M of the edge coloring portion 4, the coloring density continuously increases. The color density is distributed so as to continuously decrease from the central portion M to the outer end portion C of the rim coloring portion 4. Further, in the example shown in FIG. 8B, the color density is distributed so as to continuously decrease to the outer end portion D of the outer transition coloring portion 8.
As described above, the actual iris and sclera portion (white eye portion) gradually change in color density and hue, and similarly, the border coloring portion 4, the transition coloring portion 6, and the outer transition coloring portion. By continuously changing the coloring density of 8, when the wearer wears the color contact lens 2, a more natural appearance can be obtained.

  As is apparent from the graph of FIG. 8B, the graph having both the position in the radial direction R and the coloring density as both axes is from the inner end of the transition coloring portion 6 to the outer end C of the border coloring portion 4 or the transition. A smooth curve is drawn from the inner end of the colored portion 6 to the outer end D of the outer transition colored portion 8. As a result, even if a deviation occurs between the eyeball B and the color contact lens 2, the sclera (white eye) adjacent to the outside of the iris I is prevented from being exposed, and the color contact lens 2 is reliably A natural appearance at the time of wearing can be given.

As described above, the color contact lens 2 according to the embodiment of the present invention is
An annular colored region having colored dots of a first color corresponding to the color of the iris portion I of the wearer, the rim colored portion 4 disposed at a position bordering the outer shape of the iris I;
An annular colored region having colored dots of the first color, which is arranged adjacent to the inside of the border colored portion 4 and between the border colored portion 4 and the region where the inside colored dots of the first color do not exist Transition coloring portion 6 that connects
The coloring density of the rim coloring portion 4 is within a certain range,
The color density of the transition colored portion 6 is distributed so as to decrease in the radial direction from the outside toward the inside.

  Therefore, the rim coloring portion 4 can clearly show the wearer's iris in a natural manner, and is arranged inside the rim coloring portion 4 so that the density of the colored dots decreases from the outside to the inside. Even if the coloring part 6 is displaced between the eyeball and the color contact lens due to the movement of the wearer's eyes, the sclera part (white eye part) is not visually recognized and has a natural appearance. A color contact lens 2 can be provided.

Next, referring to FIG. 9A to FIG. 10E, the result of comparing an example in which the color contact lens according to the present invention was actually manufactured and mounted with a comparative example in which the conventional color contact lens was mounted was compared. This will be described below.
9A to 9E are diagrams (photographs) showing a comparative example using a conventional color contact lens. 9A is a diagram (photo) showing the case where the wearer looks at the front, FIG. 9B is a diagram (photo) showing the case where the wearer looks at the right side, and FIG. 9C is a diagram when the wearer is on the left side. 9D is a diagram (photo) showing a case where the wearer looks at the upper side, and FIG. 9E is a diagram showing a case where the wearer looks at the lower side. (Photo).
10A to 10E are diagrams (photographs) showing examples of the color contact lens according to the present invention. FIG. 10A is a diagram (photograph) showing a case where the wearer looks at the front, FIG. 10B is a diagram (photograph) showing a case where the wearer looks at the right side, and FIG. 10C is a diagram when the wearer is on the left side. 10D is a diagram (photo) illustrating the case where the wearer looks at the upper side, and FIG. 10E is a diagram illustrating the case where the wearer looks at the lower side. (Photo).

As a comparative example, a color contact lens having the following specifications was prepared.
1. Dimensions of each part (1) Lens outer diameter: 14.2 mm
(2) Diameter of the outer edge of the rim coloring portion: 13.4 mm
(3) Width dimension in the radial direction of the rim coloring portion: 0.67 mm

As an example, a color contact lens having the following specifications was prototyped.
1. Dimensions of each part (1) Lens outer diameter: 14.2 mm
(2) Diameter of outer end of outer transition colored portion: 13.6 mm
(3) Width dimension in the radial direction of the outer transition colored portion: 0.22 mm
(4) Border coloring portion 4 Width in radial direction: 0.65 mm
(5) Width dimension in the radial direction of the transition colored portion: 0.94 mm
2. Average density of colored dots (area of colored dots / area of the entire area where colored dots are arranged)
(1) Outer transition colored portion: 6.8%
(2) Outer transition coloring part: 61.3%
(3) Transition colored portion: 31.9%

<Comparison result>
In the comparative example using the conventional color contact lens shown in FIGS. 9A to 9E, when the wearer looks at the front (see FIG. 9A), the outline of the wearer's iris is clearly shown by the border coloring portion. Can do. However, when the eyes are moved left and right and up and down from the front view (see FIGS. 9B to 9E), as shown by the arrow X, the sclera portion (white eye portion) following the outside of the iris portion is visually recognized from the outside. become able to. As a result, the area where the white color is missing is exposed in the iris part, and an extremely unnatural appearance is exhibited.

  On the other hand, in the embodiment using the color contact lens according to the present invention shown in FIGS. 10A to 10E, when the wearer looks at the front (see FIG. 10A), the outline of the wearer's iris is outlined by the rim coloring portion. It can be clearly shown, and since the color density of the transition colored portion decreases from the outside to the inside, a natural appearance can be given. Even when the eyes are moved left and right and up and down from the front view (see FIGS. 10B to 10E), the sclera portion (white eye portion) following the outside of the iris portion is covered with the transition coloring portion, and the arrow As indicated by Y, the sclera portion (white eye portion) is not exposed from the outside.

  As described above, even in a comparative test that was actually performed by manufacturing a color contact lens, the effects achieved by the color contact lens according to the embodiment of the present invention were demonstrated.

  Although the embodiments and embodiments of the present invention have been described, the disclosed contents may vary in the details of the configuration, and combinations of elements and changes in the order of the embodiments, embodiments, etc. are claimed in the present invention. It can be realized without departing from the scope and spirit of the present invention.

2 Color contact 4 Border coloring portion 6 Transition coloring portion 8 Outer transition coloring portion 10 Other coloring portion 102 Color contact 104 Border coloring portion B Eyeball I Iris portion (black eye portion)
W Sclera (white eye)
P Pupil UL Upper eyelid LL Lower eyelid

Claims (4)

An annular colored region having colored dots of a first color corresponding to the color of the iris portion of the wearer, the border colored portion disposed at a position bordering the outer shape of the iris portion;
An annular colored region having colored dots of the first color, and a transition colored portion disposed adjacent to the inside of the border colored portion;
Other colored portions (excluding an iris pattern) that are disposed inside the transition colored portion and the transition colored portion and have colored dots of a second color that is lighter than the first color;
With
The color contact lens, wherein the color density of the transition color part and the color density of the other color part are distributed so as to decrease in the radial direction from the outside toward the inside.   In the radial direction, the color density continuously increases from the inner end of the transition coloring portion to the central portion of the border coloring portion, and the outer edge of the border coloring portion from the center portion of the border coloring portion. The color contact lens according to claim 1, wherein the color density is distributed so as to decrease continuously as it goes to the portion.   The graph having the radial position and the coloring density as both axes draws a smooth curve from the inner end of the transition coloring portion to the outer end of the border coloring portion. The described color contact lens. An annular colored region having colored dots, further comprising an outer transition colored portion disposed adjacent to the outer side of the border colored portion;
The color according to any one of claims 1 to 3, wherein the coloring density of the outer transition coloring portion is distributed so as to decrease in the radial direction from the inner side to the outer side. contact lens.