WO2015108211A1

WO2015108211A1 - Soft contact lens for presbyopia and manufacturing method therefor

Info

Publication number: WO2015108211A1
Application number: PCT/KR2014/000461
Authority: WO
Inventors: 이창선
Original assignee: (주)고려아이텍
Priority date: 2014-01-16
Filing date: 2014-01-16
Publication date: 2015-07-23

Abstract

The present invention relates to a soft contact lens comprising: a light-transmitting area formed in a pre-set size at a center part of the soft contact lens so as to allow an incident light to pass therethrough; and a first light-blocking area formed around the perimeter of the light-transmitting area to be larger than the light-transmitting area and smaller than the soft contact lens so as to block the incident light, wherein the first light-blocking area has a plurality of fine holes which are capable of allowing the incident light to pass therethrough and are non-uniformly distributed over the entire inner part of the first light-blocking area.

Description

Soft contact lens for presbyopia and its manufacturing method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soft contact lens for presbyopia and a method of manufacturing the same. In particular, light transmission for transmitting light having a diameter of a certain size in the center of a soft contact lens The depth of focus can be increased by selectively blocking the light entering the eyes by forming an area, and forming a light blocking area having a certain diameter outside the light transmitting area and forming a micro hole in the light blocking area, The soft contact lens for presbyopia and the manufacturing method for the presbyopia to secure a bright field of view by securing the amount of light that may be insufficient due to the setting of the light blocking area by increasing the distribution density of the fine hole toward the It is about.

In general, a person's eyes must look far away and the refractive power of the eye must change, and the length of the cornea and the front and rear eyes cannot change. This process is called regulation.

However, as the lens hardens and loses its elasticity as it ages, this decreases the ability to control the short-range work, which is called presbyopia.

This presbyopia is a kind of aging phenomenon, the eye's control ability decreases with age, which is caused by ciliary body (muscle that controls the refractive power of the lens at both ends of the lens) or the elasticity of the lens and hypertrophy of the lens.

When you are young, you can see clearly because the ciliary or crystalline lens is very elastic, and when you see an object in close proximity, the ciliary body contracts and the lens becomes thicker, which increases the refractive power. Since the refractive power of the lens does not increase, the distance is clearly visible and the nearby image is blurred.

On the other hand, for the correction of the presbyopia, optical correction and surgical correction are generally proposed. The prevention and treatment of presbyopia has not been completed yet, but research on presbyopia that maintains near vision to some extent, including optical correction and surgical correction, is being conducted.

From the use of existing low-cost near lens (magnifying glass) to experimental surgical procedures, the aim is to restore control in presbyopia.

For example, dual or multifocal contact lenses may have a high refractive power or asymmetrical design in the center. A lens having a high refractive power in the center has a strong refractive power near the center and a weaker refractive power toward the surroundings. The asymmetric design uses diffraction optics to focus light at different distances. The focus distribution for near or distant objects depends on the diffraction design.

In addition, monovision contact lenses are corrected for one eye and the other for mono vision in mono vision. This provides clear vision in both distance and near-end. In general, it is prescribed in the case of dominant in the superior and non-advanced in the superior, and in the case of unadapted after two weeks of adaptation. During adaptation, presbyopia learns to endure monovision and ignore out-of-focus images.

However, the use of the above-described monovision contact lens is reduced in vision and contrast sensitivity. There are also problems with glare, diplopia, halo, and reduced distance sensations in general, as well as eye fatigue and headaches.

Therefore, in the manufacture of soft contact lenses for presbyopia, the depth of focus can be increased by selectively blocking the light incident to the eye by forming a light transmission area having a predetermined diameter in the center of the soft contact lens. By forming the light blocking area having a certain diameter on the outside of the light transmission area and forming the micro holes in the light blocking area, the density of the micro holes is increased as it goes toward the outside of the area. The present invention provides a soft contact lens for presbyopia and a method of manufacturing the same for securing a bright field of view by securing an amount of light that may be insufficient.

The present invention as described above is a soft contact lens, a light transmission region formed at a predetermined size in the center of the soft contact lens to transmit incident light, and larger than the light transmission region outside the light transmission region, and the soft contact lens. The first light blocking region is formed to have a smaller size and blocks the incident light, and the first light blocking region has a plurality of micro holes that are transparent to the incident light, which are uneven throughout the first light blocking region. It is characterized in that the distribution.

In addition, the fine hole is characterized in that the distribution density is formed high in the outer direction of the first light blocking region.

The soft contact lens may further include a second light blocking region formed in a predetermined area between the light transmitting region and the first light blocking region to have a smaller size than the first light blocking region to block the incident light. It features.

In addition, the light transmission region may be formed in a quadrangular or rhombus shape or in a circular shape having a predetermined diameter.

The light transmissive region may be formed to have a diameter greater than zero and smaller than the diameter of the intraocular lens opening portion to which the soft contact lens is mounted.

In addition, the first light blocking region may have a diameter larger than the diameter of the light transmitting region and smaller than the diameter of the soft contact lens in a donut shape.

In addition, the light transmitting region is characterized in that formed in a diameter of 1.00 ~ 2.20mm.

In addition, the first light blocking region is characterized in that the diameter of 4.00 ~ 9.50mm.

The second light blocking region may be formed in a donut shape with a diameter smaller than the first light blocking region in a predetermined region adjacent between the light transmitting region and the first light blocking region.

The second light blocking region may be formed to have a diameter of 2.5 to 3.5 mm larger than the diameter of the light transmitting region.

In addition, the first light blocking region is characterized by being colored with a color that can adjust the contrast sensitivity of the field of view.

In addition, the first light blocking region is characterized by being colored in a yellow or black series.

In addition, the second light blocking region is characterized in that the brightness of the same series as the first light blocking region is colored with a color higher than a predetermined reference.

In addition, the micropores are characterized by being formed with a diameter of 0.10 ~ 0.20mm.

In addition, the present invention provides a method for manufacturing a soft contact lens, the step of forming a light transmission region for transmitting incident light at a predetermined size in the center of the soft contact lens, and larger than the light transmission region to the outside of the light transmission region And forming a first light blocking region that blocks the incident light to a size smaller than that of the soft contact lens, and uneven distribution of a plurality of micropores that can transmit the incident light in the entire interior of the first light blocking region. Forming a furnace.

The method may further include forming a second light blocking region in the predetermined region adjacent between the light transmitting region and the first light blocking region to block the incident light to a smaller size than the first light blocking region. It features.

In addition, the light transmission region is characterized in that it is formed larger than zero and smaller than the diameter of the intraocular lens opening portion to which the soft contact lens is mounted.

According to the present invention, in the manufacture of soft contact lenses for presbyopia, there is an advantage of increasing the depth of focus by selectively blocking the light incident to the eye by forming a light transmission area having a predetermined diameter in the center of the soft contact lens have. In addition, by forming the light blocking region having a predetermined diameter on the outside of the light transmission region and forming a micro hole in the light blocking region, the distribution density of the micro holes increases toward the outside of the corresponding region. There is an advantage to ensure a bright field of view by ensuring the amount of light that can be lacking.

In addition, the present invention has the advantage of preventing the damage to the optic nerve or optic cells by blocking the ultraviolet light or blue light as well as adjusting the contrast sensitivity by performing a coloring with a color that can control the contrast sensitivity in the light transmission region and the light blocking region. .

In addition, there is an advantage that the aesthetic effect can be obtained when applied to a patient with damage to the iris, such as iris defects through coloring in the color selected by the user for the light transmission area and the light blocking area.

1 is a view showing an example in which a soft contact lens for presbyopia according to an embodiment of the present invention is mounted on the eyeball,

2 is a detailed structural diagram of a soft contact lens for presbyopia according to an embodiment of the present invention,

Figure 3 is an illustration of the coloring of the soft contact lens for presbyopia according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of the present invention. In the following description of the present invention, when it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

1 illustrates an example in which a soft contact lens for presbyopia according to an embodiment of the present invention is mounted on an eyeball.

Referring to FIG. 1, first, the human eye 100 may include an intraocular lens 104, ie, a lens, located on the cornea 102 and the posterior surface of the cornea 102. The cornea 102 is the first focusing element of the eye 100, and the intraocular lens 104 is the second focusing element of the eye 100. The eye 100 may also include a retina 106 in contact with the interior of the posterior surface of the eye 100. The retina 106 contains receptor cells that are primarily responsible for vision and may include a high sensitivity region known as the macula, where signals are received and transmitted through the optic nerve to the brain's visual center.

In the human eye 100 as described above, the light 112 incident to the cornea 102 is refracted through the intraocular lens 104 to focus on the surface of the retina 106 to recognize an object. When the intraocular lens 104 does not contract smoothly due to presbyopia, some of the light 112 incident to the cornea 102 through various paths is not accurately focused on the surface of the retina 106. As described above, the presbyopia phenomenon such as blurring of an object is generated.

Therefore, in the present invention, the soft contact lens 110 of the present invention in which the light blocking unit 108 is formed so as to selectively block the light 112 by adjusting the amount of light 112 incident to the cornea 102. To the cornea 102. When the soft contact lens 110 is mounted in this way, as shown in FIG. 1, the light 112 incident to the intraocular lens 104 through the cornea 102 may be selectively blocked, thereby retina 106. By blocking the light 114 and 116 incident through the path that is not in focus, the depth of focus may be increased.

In this case, a problem may occur in that the field of view is dark due to the light 114 and 116 blocked to increase the depth of focus as described above, but for such a problem, a plurality of fine particles capable of injecting light into the light blocking unit 108 may be caused. By forming holes (not shown), it is possible to ensure a bright field of view. The detailed operation of the soft contact lens 110 will be described later in detail with reference to FIG. 2, which shows the structure of the soft contact lens 110.

2 illustrates a structure of the soft contact lens 110 for presbyopia of FIG. 1 according to an exemplary embodiment of the present invention, and includes a first light blocking unit constituting the light transmitting region 200 and the light blocking unit 108. The region 202, the second light blocking region 206, and the micro holes 204 formed in the first light blocking region 202 may be included.

1 and 2 will be described in detail the operation of each component of the soft contact lens 110 for presbyopia according to an embodiment of the present invention.

First, the light transmission region 200 is formed at a predetermined size in the center of the soft contact lens 110 to transmit incident light. The light transmissive region 110 reduces the size of the pupil, thereby reducing the light 112 incident on the cornea 102 at various angles, and allowing light 112 to be incident only in a consistent direction. ) To increase the depth of focus on the retina 106.

That is, since the light 112 incident to the cornea 102 at various positions makes images of objects at various positions on the retina 106, the angle of light 112 incident to the light transmission region 200 is reduced. In this case, the path through which light 112 is incident is narrowed by a pinhole effect, thereby reducing the amount of incident light 112, thereby increasing the depth of focus by eliminating some of the various images created at various locations. To make it possible. At this time, the light of the same path is consistently clear image regardless of the distance.

On the other hand, such a light transmission area 200 generally increases the depth of focus as the size is smaller, but if the size is too small, it is not suitable for the general size of the pupil, for example, the size of 2 to 4 mm, but also weak light When the pupil is enlarged due to scattered light reflection, a donut shape may be seen in the field of view. In addition, if the light transmission region 200 is too large, the pinhole effect may be reduced, and thus the depth of focus may not be adjusted.

Accordingly, the light transmission region 200 may be formed in a circular shape having a predetermined diameter of a predetermined diameter as shown in FIG. 2, and the diameter of the opening region 130 on the intraocular lens 104. It is formed smaller than to reduce the pupil size, in this case, the diameter of the light transmission region 200 may be set to, for example, 1.00 to 2.20 mm.

In addition, the shape of the light transmissive area 200 as described above has been described with an example of being formed in a circular shape for convenience of description, but the shape of the light transmissive area 200 may be modified in a rectangular or rhombus shape in some cases. .

The first light blocking region 202 is formed outside the light transmission region 200 to be larger than the light transmission region 200 and smaller than the soft contact lens 110 to enter the cornea 102. To block. In this case, for example, the first light blocking region 202 may be formed larger than the diameter of the light transmission region 200 and smaller than the diameter of the soft contact lens 110.

As described above, the focus is achieved by transmitting only the light 114 and 116 passing through the light transmission region 200 among the light 112 incident to the cornea 102 by the light blocking function of the first light blocking region 202. Can increase.

However, when the light is completely blocked in the first light blocking region 202, the amount of light 112 incident to the eye 100 is reduced, resulting in a dark field of view, and the first light blocking region on the field of view. A donut shape according to the shape of 202 may appear.

Accordingly, as shown in FIG. 2, in addition to the first light blocking region 202, the amount of light 112 that is incident is formed by forming a plurality of micro holes 204 that can transmit the light 112. It can be added to reduce donuts and provide a bright field of view. At this time, the micro-holes 204 as described above may be unevenly distributed in the first light blocking region 202, and more preferably, the number of micro holes 204 is gradually increased toward the outer side of the first light blocking region 202. In other words, by increasing the distribution density, the donut-shaped blurry image can be further reduced, and the light 112 transmitted by the gradually increasing micropores 204 is secured by a predetermined amount or more, so that the field of view is overall. You can make it brighter.

The fine holes 204 as described above can secure enough light as the spacing between the fine holes 204 is narrowed, while the wider the holes can be, the higher the contrast can be. Therefore, the first light blocking region 202 can be improved. ) Can be produced by dividing the contrast into two parts or three parts and sequentially changing the contrast. In this case, the diameter of the micro holes 204 may be set to, for example, 0.10 to 0.20 mm, and the diameter of the first light blocking region 202 may be set to, for example, 4.00 to 9.50 mm.

The second light blocking region 206 is formed to have a smaller size than the first light blocking region 202 in an adjacent predetermined region such as an interface between the light transmitting region 200 and the first light blocking region 202 and the light 112. To block. The second light blocking region 206 may be colored in a bright color, and the pinhole effect may be further increased by the second light blocking region 206, thereby increasing the depth of focus. do. That is, when a plurality of micro holes 204 are distributed throughout the first light blocking region 202, light 112 is transmitted through the micro holes 204, which causes astigmatism effect due to enlargement of the pupil in a dark place. This may be achieved by using the second light blocking region 206 colored with a high brightness to alleviate this. In this case, the color to be colored in the second light blocking region 206 may be set to a color whose brightness of a series, such as the first light blocking region 202, is higher than a predetermined reference value. In addition, the diameter of the second light blocking region 206 as described above may be set to, for example, about 2.5 to 3.5 mm larger than the diameter of the light transmitting region 200.

3 illustrates various patterns colored in the light transmission region 200, the first light blocking region 202, and the second light blocking region 206 according to an exemplary embodiment of the present invention.

As shown in FIG. 3 above, part or all of the light transmission region 200 and the first light blocking region 202 are colors that can adjust contrast sensitivity of the field of view, for example, yellow or black. 3 may be colored in a different color series for convenience, and the second light blocking area 206 may be colored in a dark color, but the same color as that of the first light blocking area 202 may be used. It can be colored by color.

In addition, in the coloring of the light transmitting region 200, the first light blocking region 202, and the second light blocking region 206 as described above, the color can be selected according to the light of the wavelength to be blocked if necessary, The contrast of the coloring can also be adjusted.

Accordingly, contrast sensitivity can be controlled by coloring the light transmitting area 200, the first light blocking area 202, and the second light blocking area 206 as described above, and block the ultraviolet and blue light to prevent optic nerves or eye cells. It can also prevent damage. In addition, aesthetic effects may be obtained when applied to patients with iris damage, such as iris defects.

As described above, in the present invention, in the manufacture of soft contact lenses for presbyopia, by forming a light transmission region for transmitting light having a predetermined diameter in the center of the soft contact lens to selectively block the light entering the eye This has the advantage of increasing the depth of focus. In addition, by forming the light blocking region having a predetermined diameter on the outside of the light transmission region and forming a micro hole in the light blocking region, the distribution density of the micro holes increases toward the outside of the corresponding region. It ensures a bright field of view by securing the amount of light that can be lacking. In addition, the present invention not only controls contrast sensitivity by coloring the light transmissive region and the light blocking region in a color capable of adjusting contrast sensitivity, but also blocks ultraviolet rays or blue light to prevent damage to the optic nerve or optic cell.

Meanwhile, in the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the invention should be determined by the claims rather than by the described embodiments.

Claims

As a soft contact lens,

A light transmission region formed at a predetermined size in the center of the soft contact lens to transmit incident light;

And a first light blocking area formed outside the light transmitting area larger than the light transmitting area and smaller than the soft contact lens to block the incident light.

And a plurality of micropores in the first light blocking region that are uniformly distributed in the entire interior of the first light blocking region.
The method of claim 1,

The fine hole,

Soft contact lens, characterized in that the distribution density is formed in the outer direction of the first light blocking region.
The method of claim 1,

The soft contact lens,

And a second light blocking area formed in a predetermined area adjacent to the light transmitting area and the first light blocking area to have a smaller size than the first light blocking area to block the incident light.
The method of claim 1,

The light transmission region,

A soft contact lens is formed in the shape of a square or rhombus, or in the form of a circle having a predetermined diameter.
The method of claim 4, wherein

The light transmission region,

A soft contact lens, characterized in that it is formed with a diameter larger than zero and smaller than the diameter of the opening area on the intraocular lens on which the soft contact lens is mounted.
The method of claim 5,

The first light blocking region,

And a donut shape having a diameter larger than the diameter of the light transmitting region and smaller than the diameter of the soft contact lens.
The method of claim 5,

The light transmission region,

Soft contact lens, characterized in that formed in the diameter of 1.00 to 2.20 mm.
The method of claim 6,

The first light blocking region,

Soft contact lens, characterized in that formed in the diameter of 4.00 to 9.50 mm.
The method of claim 3, wherein

The second light blocking region,

And a donut shape having a smaller diameter than the first light blocking region in a predetermined region adjacent between the light transmitting region and the first light blocking region.
The method of claim 9,

The second light blocking region,

Soft contact lens, characterized in that formed to a diameter of 2.5 to 3.5 mm larger than the diameter of the light transmission region.
The method of claim 1,

The first light blocking region,

A soft contact lens, characterized by being colored in a color capable of adjusting the contrast sensitivity of the field of view.
The method of claim 11,

The first light blocking region,

A soft contact lens, characterized by being colored yellow or black.
The method of claim 3, wherein

The second light blocking region,

The soft contact lens of claim 1, wherein the brightness of the same series as the first light blocking region is colored with a color higher than a predetermined reference.
The method of claim 1,

The micropores,

A soft contact lens, characterized in that it is formed with a diameter of 0.10 to 0.20 mm.
As a method of manufacturing a soft contact lens,

Forming a light transmission region for transmitting incident light at a predetermined size in the center of the soft contact lens;

Forming a first light blocking region outside the light transmitting region to block the incident light in a size larger than the light transmission region and smaller than the soft contact lens;

Forming a plurality of micropores having a non-uniform distribution through which the incident light can be transmitted to the entire interior of the first light blocking region.

Soft contact lens manufacturing method comprising a.
The method of claim 15,

The method,

And forming a second light blocking area in a predetermined area adjacent to the light transmitting area and the first light blocking area to block the incident light to a size smaller than the first light blocking area. Manufacturing method.
The method of claim 15,

The fine hole,

A soft contact lens manufacturing method, characterized in that the distribution density is formed in the outer direction of the first light blocking region.
The method of claim 15,

The light transmission region,

A soft contact lens manufacturing method, characterized in that formed in the shape of a square or rhombus, or in the form of a circle having a predetermined diameter.
The method of claim 18,

The light transmission region,

A method of manufacturing a soft contact lens, characterized in that it is formed larger than zero and smaller than the diameter of the intraocular lens opening portion on which the soft contact lens is mounted.
The method of claim 19,

The first light blocking region,

And a donut shape having a diameter larger than the diameter of the light transmitting region and smaller than the diameter of the soft contact lens.
The method of claim 19,

The light transmission region,

Soft contact lens manufacturing method characterized in that formed in a diameter of 1.00 to 2.20 mm.
The method of claim 20,

The first light blocking region,

4.00 to 9.50 mm, characterized in that the soft contact lens manufacturing method characterized in that formed.
The method of claim 16,

The second light blocking region,

And a donut shape having a diameter smaller than that of the first light blocking region in a predetermined region adjacent to the light transmitting region and the first light blocking region.
The method of claim 23, wherein

The second light blocking region,

Soft contact lens manufacturing method characterized in that formed to a diameter of 2.5 to 3.5 mm larger than the diameter of the light transmission region.
The method of claim 15,

The micropores,

Soft contact lens manufacturing method characterized in that formed to a diameter of 0.10 to 0.20 mm.