TWM575538U - Cornea-matching contact lens - Google Patents

Abstract

The present invention relates to a contact lens for anastomosis of the cornea, which mainly uses a virtual axis to separate the cornea of the eyeball from a plurality of blocks at the center of the eyeball, and sets a plurality of reference points on each block according to the concave-convex structure on the cornea of the eyeball. And then forming a mirror contact lens with a smooth curved surface along the reference points, thereby increasing the contact area between the cornea and the contact lens by means of concave-convex bonding, thereby increasing the degree of contact between the contact lens and the cornea, preventing blinking or rotating the eyeball. The contact lens is displaced to maintain the contact lens in the proper position of the human eye.

Description

Anastomotic contact lens

The present invention relates to a contact lens, and more particularly to a contact lens that can be formed according to the base curve of the cornea and the surface structure to form an anastomosis cornea.

A contact lens is a lens that can directly attach to the tear layer on the corneal surface to correct vision. However, since the shape of the eyeball is not a true circle, it is a slightly rounded and elliptical structure, and its surface has a very fine concave and convex structure. Therefore, when wearing a contact lens, the contact lens may not completely conform to the cornea of the eyeball due to the concave-convex structure of the surface of the eyeball, so that when the person blinks or turns the eyeball to change the viewing direction, the contact lens moves and rotates accordingly. The optical axis of the contact lens no longer matches the optical axis of the eye, thereby causing a change in vision of the person and causing discomfort to the eye. Therefore, the biggest problem in the current contact lens wear is how to keep the contact lens in the human eye. In the proper position.

In order to cope with the above problems, the easiest solution is to use a large-diameter soft contact lens that uses a plastic part outside the visual portion or the central area to position the contact lens on the patient's eye to increase contact through the plastic part. The area of the cornea is attached to the eyelid to help keep the contact lens in a specific position. However, this method can be quite uncomfortable for a person wearing a contact lens, resulting in inability to wear invisible for a long time. Glasses, so they can’t be accepted by consumers Accepted, so it is not a good solution.

Therefore, US Pat. No. 7,296,890 B2 proposes a method of using a plurality of curvatures of a contact lens base arc so that the contact lens fits the wearer's corneal shape and curvature, thereby increasing contact between the contact lens and the cornea, and reducing blinking or turning the eyeball. The problem of the contact lens running away, however, although the patent is premised, it does not consider that the corneal surface is not completely smooth, but has a complex concave and convex structure. Therefore, wearing this patent In the case of the contact lens of the previous case, there is still a problem that the contact lens runs away, so it is not a good solution.

In summary, how to provide a contact lens that avoids the problem that the contact lens moves due to blinking or rotating the eyeball, thereby causing the optical axis of the contact lens to mismatch the optical axis of the eye, is an urgent problem in the art. problem.

In order to solve the problems of the prior art described above, it is an object of the present invention to provide a contact lens that can conform to the corneal base arc and prevent the contact lens from moving so that its optical axis does not match the optical axis of the eye.

In order to achieve the above objectives, the contact lens of the cornea is mainly to divide the human eyeball into a plurality of blocks by a plurality of virtual axes, and set the complex depression point and the convex point of the corneal surface of each block as the reference point. And then forming a contact lens with a smooth curved surface and conforming to the corneal surface structure along the reference points, thereby fitting the contact lens to the cornea, avoiding the displacement of the contact lens when the person blinks or turns the eyeball to change the viewing direction. The situation happened.

1‧‧‧ lenses

11‧‧‧ front mirror

12‧‧‧ rear mirror

2‧‧‧Virtual axis

21‧‧‧A1 virtual axis

22‧‧‧A2 virtual axis

3‧‧‧ eyeballs

31‧‧‧Cornea

4‧‧‧ benchmark

1 is a front view of a contact lens for creating an anastomosis of the cornea; FIG. 2 is a schematic side view of a contact lens for creating an anastomosis of the cornea; FIG. 3 is a schematic view showing a state of use of the contact lens for creating an anastomosis; FIG. The virtual axis will separate the cornea out of a plurality of blocks; and Figure 5 is a schematic diagram of the creation of a plurality of blocks separating the cornea by five virtual axes.

The specific embodiments are described below to illustrate the implementation of the present invention, but are not intended to limit the scope of the present invention.

Referring to FIGS. 1~3, the contact lens of the artificial cornea comprises at least one lens 1 having a convex front mirror surface 11 and a concave rear mirror surface 12, wherein the rear mirror surface 12 is formed by a plurality of virtual surfaces. The shaft 2 separates the eyeball 3 into a plurality of blocks, and uses the plurality of concave and convex points on the surface of the cornea 31 of the eyeball 3 in each block as the reference point 4, and then forms a smooth arc along the reference points 4 The rear mirror surface 12 conforms to the surface structure of the cornea 31 of the eyeball 3.

Since the human eye 3 is a slightly rounded and elliptical structure, and the surface of the cornea 31 of the eyeball 3 has a very fine concave and convex structure, the curvature of each eye 3 and the uneven structure of the surface of the cornea 31 are different, and The conventional technique adjusts the curvature of the contact lens only for each person's eyeball shape, and does not consider the concave-convex structure of the surface of the cornea 31, so that when the contact lens is worn, although the rear mirror surface 12 arc of the contact lens conforms to the eyeball 3 arc, Flat on the surface of the cornea 31 of the eye 3, but The bulging point on the surface of the cornea 31 causes the contact lens to open a very small gap, causing the contact lens to be deflected or rotated when the eye is blinked or the eyeball 3 is rotated.

The contact lens of the artificial cornea divides the eyeball 3 into a plurality of blocks by using the virtual axis 2, and takes the concave point and the convex point of the cornea 31 on the surface of the eyeball 3 in each block as the reference point 4 to form the main surface of the rear mirror 12. The purpose is to correspond to the concave and convex structure on the surface of the cornea 31 through the reference points 12, so that the curved surface of the rear mirror surface 12 not only conforms to the curved surface of the eyeball 3, but also forms the surface of the rear mirror surface 12 to have a concave point and a convex point corresponding to the cornea 31. The concave-convex structure prevents the contact lens from shifting or rotating when blinking or turning the eyeball 3.

For example, according to the shape of each person's eyeball 3 and the concave-convex structure of the surface of the cornea 31, the creation of the contact lens is performed by using a plurality of virtual axes 2 to divide the eyeball 3 into a plurality of the same size and shape or differently based on the center of the eyeball. a block of size and shape, and in this embodiment, the eyeball 3 is divided into four blocks of the same size and shape by the A1 virtual axis 21 and the A2 virtual axis 22 into the A block, the B block, the C block, and the D block. The block, then, the complex depression point and the convex point on the cornea 31 of the eyeball 3 in each block are used as the reference point 4 (the number of reference points set by each block may be the same or different numbers), and along The reference points 4 form the contact lens 1 having the mirror surface 12 after the smooth curved surface. Therefore, when the contact lens provided by the present invention is worn, the surface of the rear mirror 12 corresponds to the position of the convex point on the cornea 31 as a depression. The curved surface, and the surface of the mirror surface 12 corresponding to the concave point on the cornea 31 is a convex curved surface, which increases the contact area of the cornea 31 and the contact lens by means of the concave-convex combination, so that the person wearing the contact lens blinks or rotates. Eyeball 3 o'clock Lens shift is not easy, and the contact lens is held in place on the eyeball 3, thereby avoiding the phenomenon of optical axis of the lens of the eye do not match.

In addition, please refer to Figure 1, 4~5, this creation uses the virtual axis 2 to make the eyeball 3 Separating the complex blocks does not limit the surface of the eyeball 3 from the complex virtual axis 2 to four blocks, or the virtual axis 2 may separate the surface of the eyeball 3 into three blocks, five blocks or more. The more the blocks are separated, and the more the reference points 4 are provided in each block with the concave and convex points of the cornea 31, the more the contact lenses are provided. The cornea is more anastomosed. However, in considering the production time and processing difficulty of the contact lens, the contact lens of the cornea in the preferred embodiment divides the eyeball 3 into four blocks and is arranged in each block. There are four reference points, but this embodiment is not intended to limit the scope of the patents of the present invention. Therefore, equivalent implementations or changes that do not depart from the spirit of the art should be included in the scope of the patent.

Claims (5)

A corneal contact lens, the lens of the contact lens comprising a convex front mirror surface and a concave rear mirror surface, wherein the rear mirror surface separates the eyeball cornea into a plurality of blocks by a plurality of virtual axes, and each region A plurality of concave points and/or convex points on the cornea in the block serve as reference points, and a rear mirror surface having a smooth curved surface is formed along the reference points. The contact lens of the cornea according to claim 1, wherein the plurality of virtual axes separate the cornea of the eyeball into a plurality of blocks of the same size and shape based on the center of the cornea of the eyeball. The contact lens of the cornea according to claim 1, wherein the plurality of virtual axes separate the cornea of the eyeball into a plurality of blocks of different sizes and shapes based on the center of the cornea of the eyeball. The contact lens of the cornea according to claim 1, wherein the reference points are distributed within the respective blocks in the same amount. The contact lens of the cornea according to claim 1, wherein the reference points are distributed in different numbers within the respective blocks.