TWM541025U - Cornea shaping contact lenses - Google Patents

Description

Corneal contact lens

The present invention relates to a contact lens for corneal molding, especially when the user closes the eye, the weight of the thickening layer passing through the outer surface of the lens increases the tear force between the inner surface of the lens and the cornea of the eye to exert a force on the surface of the cornea. To the pressure, compared with the general keratoplasty lens, the central curvature of the cornea can be shortened to reduce the refractive power of the cornea, thereby achieving the purpose of correcting myopia.

According to the development and innovation of various electronic and electrical products, it brings many conveniences in daily life and work, especially the large number of 3C electronic products, which has caused the popularization of communication and Internet applications. Many people are immersed in the use of 3C electronic products, and a large number of 3C electronic products have been used for a long time, whether it is office workers, student groups or middle-aged people, and the scope of coverage is quite extensive, which leads to the phenomenon of low-headed people. As a result, many people's eye vision loss, injury and other conditions have become increasingly serious, and the myopia population has increased relatively.

Furthermore, the reason why people develop myopia is that the eye's ability to bend the light does not match the length of the eye. It may be that the eye axis is too long or the corneal curvature is too steep, causing the visual imaging point to fall in front of the retina. This causes blurring of the visual imaging. Therefore, in order to correct myopia, it is necessary to reduce the tortuosity of the eye. Since the cornea has a tortuosity of about 80% of the total eye, it is only necessary to reduce the refractive power of the cornea to achieve the effect of correcting myopia. .

However, the current methods of reducing the refractive power of the cornea mainly include the methods of wearing myopia correction, wearing myopia contact lens correction, corneal myopia surgery or wearing keratoplasty lens correction. The above methods have their advantages and disadvantages. Therefore, the corneal plastic contact lens is specially studied, wherein the corneal plastic lens is made of a high oxygen permeability hard material, and when the lens is worn on the eyeball, the lens and the outer surface of the cornea of the eyeball are With a layer of unevenly distributed tears, the epithelial cells can be flattened by the positive pressure exerted on the cornea by the tears. At the same time, if the wearer uses the eyelids to perform the action of closing or blinking, it will be through the eyelids and The weight of the lens applies a certain pressure to the cornea. If the wearing time is sufficient, the central curvature of the cornea is gradually flattened and the central epithelial layer is gradually thinned, so that the central cornea is flattened, thereby reducing the refractive power of the cornea. Corrects the effect of myopia and even normal vision.

Therefore, how to design the corneal contact lens to effectively flatten the center of the cornea to reduce the refractive power of the cornea, and then to achieve the purpose of correcting myopia, has become a subject worthy of study.

Therefore, in view of the above-mentioned shortcomings, the creators have collected relevant information, and through multi-party evaluation and consideration, and through years of experience in the industry, through continuous trial and modification, we have designed a new type of contact lens for such corneal molding. Patent holder.

The main purpose of the creation is that the lens has an outer surface and an inner surface, and a base arc with a preset curvature is arranged at the center of the inner surface, and the outer side of the base arc is sequentially provided with a reverse arc, a preparation arc and a side. An arc, and a thickened layer is formed on the outer surface of the lens, the thickened layer is convexly provided with a central convex portion at a position above the base arc, and a thinner side convex portion is extended outside the central convex portion, when the lens When worn on the user's eyeball, there is an unevenness between the base curve and the cornea. The tear layer, when the user blinks or closes the eye, the lens can increase the overall weight through the thickening layer to increase the positive pressure applied to the corneal surface by the base curve, which can be shortened compared with the general corneal lens. The time during which the central curvature of the cornea is flattened, thereby reducing the refractive power of the cornea to reduce or eliminate the degree of myopia, and the user can determine the degree of myopia to be reduced by adjusting the thickness of the thickened layer and the curvature of the base arc.

The secondary purpose of the present invention is that the central convex portion of the thickened layer is located above the base arc of the inner surface of the lens, and the thickness of the central convex portion is thicker than the lateral convex portion of the outer side, so the central convex portion The weight is directly applied to the base arc, so that the base arc can directly press the positive pressure against the center of the corneal surface of the eyeball, thereby achieving a good pressure-resisting effect.

1‧‧‧ lenses

11‧‧‧ outer surface

12‧‧‧ inner surface

121‧‧‧Base arc

122‧‧‧Reversal arc

123‧‧‧Forming arc

1231‧‧‧first parallel arc

1232‧‧‧Second parallel arc

124‧‧‧Edge arc

2‧‧‧ Thickening layer

21‧‧‧Central convex

22‧‧‧Side

3‧‧‧ eyeballs

31‧‧‧Cornea

311‧‧‧ tears

The first picture is a three-dimensional appearance of the creation.

The second picture is a three-dimensional appearance of another perspective of the creation.

The third figure is a side cross-sectional view of the creation.

The fourth figure is a side cross-sectional view of the author's use.

In order to achieve the above objectives and effects, the technical means and structure of the present invention are described in detail in the preferred embodiment of the present invention, and the features and functions are as follows.

Please refer to the first, second and third figures, which are the three-dimensional appearance of the creation, the three-dimensional appearance of the other perspective and the side sectional view. It can be clearly seen from the figure that the creation is a night wear type. The contact lens comprises a lens 1 and a thickening layer 2, wherein: The lens 1 is worn on the eyeball 3 and has a circular arc shape and is made of a high oxygen permeability material, which includes an outer surface 11 and an inner surface 12, and the inner surface 12 is a cornea 31 attached to the eyeball 3. On the surface, a base arc 121 having a predetermined curvature and passing through the tear fluid 311 between the lens 1 and the cornea 31 is applied to the center of the inner surface 12 to be applied to the surface of the cornea 31, and then sequentially on the outer side of the base arc 121. The reverse arc 122, the preparation arc 123 and the side arc 124 are provided outward.

The thickened layer 2 is formed on the outer surface 11 of the lens 1 , and the thickened layer 2 is convexly provided with an arc-shaped central convex portion 21 at a position above the base arc 121 , and extends outside the central convex portion 21 . The side convex portion 22 having an arc shape and a thin thickness.

The predetermined arc of the base arc 121 of the inner surface 12 is greater than the horizontal arc of the cornea 31 of the eyeball 3 (ie, the arc of the base arc 121 is flatter than the horizontal arc of the cornea 31), since the arc of the base arc 121 is larger than the cornea When the lens 1 is worn on the eyeball 3, the tear wave 311 between the base arc 121 and the cornea 31 can generate a positive pressure on the epithelial cells of the cornea 31; further, the inner surface 12 The reverse arc 122 is for storing the tear 311, and the effect of the lifting lens 1 on the eyeball 3 can be achieved by the negative pressure provided by the tear fluid 311.

The preparation arc 123 of the inner surface 12 is designed along the curvature of the cornea 31 of the eyeball 3, and has a first parallel arc 1231 attached to the surface of the cornea 31, that is, through the first parallel arc 1231 and the cornea. 31 surface is in close contact, thereby improving the positioning effect of the lens 1, and the outer side of the first parallel arc 1231 is further curved along the curvature of the cornea 31 to extend a second parallel arc 1232, and the second parallel arc 1232 can be used to contact the surface of the cornea 31. Further intimate contact, to achieve the effect of making the lens 1 more conformable to the eyeball 3; The side arc 124 of the inner surface 12 is preferably designed to have a slightly raised edge. When the eye is blinking, the tear 311 can be squeezed to promote the circulation of the tear 311 of the inner surface 12 of the lens 1, which can be circulated by the tear 311. The lens 1 and the cornea 31 of the eyeball 3 are continuously lubricated and brought in oxygen to improve the comfort and wearability during wearing.

However, the width a of the base arc 121 of the inner surface 12 may be a predetermined length. When the lens diameter is 10.6, the preset length is preferably 6 mm; and the width b of the reverse arc 122 of the inner surface 12 is For a preset length, the preset length is preferably 0.6 mm; the width c of the first parallel arc 1231 of the preparation arc 123 can be a predetermined length, and the preset length is preferably 0.7 mm; The width d of the second parallel arc 1232 may be a predetermined length, and the preset length is preferably 0.6 mm; the width e of the side arc 124 of the inner surface 12 may be a preset length, and the preset length is preferably The width x of the thickening layer 2 may be a predetermined length, and the predetermined length thereof is preferably 7 mm, wherein the width y of the central convex portion 21 is preferably 4 mm, and the outer convex portion 21 extends outside. The width z of the side convex portion 22 is preferably 1.5 mm. When the lens 1 is worn on the eyeball 3, the above-mentioned size can be used to improve the comfort and wearability during wearing.

Please refer to the third and fourth figures for the side view of the creation and the side cross-sectional view of the original use. It can be clearly seen from the figure that the user is the first in the actual use. The lens 1 is worn on the eyeball 3, and the inner surface 12 of the lens 1 is attached to the surface of the cornea 31 of the eyeball 3. At this time, an uneven tear 311 is generated between the inner surface 12 of the lens 1 and the cornea 31. When the user blinks or sleeps at night and closes the eyelid (not shown), the eyelids will press against the surface of the thickening layer 2, and at the same time, the weight of the eyelid, the lens 1 and the thickening layer 2 will be Will generate a positive pressure and through the base curve 121 of the inner surface 12 and the cornea The tear 311 between 31 applies a positive pressure to the epithelial cells at the center of the surface of the cornea 31 of the eyeball 3, and the epithelial cells on the surface of the cornea 31 are pressed by the tear fluid 311 to gradually flatten the central curvature. The central epithelial layer of the cornea 31 is thinned, thereby reducing the refractive power of the cornea 31, and moving the imaged imaging point in the direction of the retina to achieve the effect of reducing the degree of myopia or eliminating the degree of myopia.

The outer surface 11 of the lens 1 is formed with a thickening layer 2, and the lens 1 can pass through the thickening layer 2 to increase the overall weight, thereby increasing the tear 311 between the base arc 121 of the inner surface 12 and the cornea 31 to be applied to the eyeball. The positive pressure at the center of the surface of the cornea 31 can shorten the time for the cornea 31 to flatten compared with the general keratoplasty lens, and the user can change the thickness of the thickening layer 2 and the curvature of the base arc 121 to achieve Adjust the effect of the degree of myopia to be improved.

Furthermore, the position of the central convex portion 21 of the artificial thickening layer 2 is above the base arc 121 with respect to the inner surface 12 of the lens 1, since the thickness of the central convex portion 21 is thicker than that of the outer side convex portion 22, and The base arc 121 is directly opposite to the base arc 121, so that the base arc 121 directly receives the weight of the central convex portion 21, so that the tear fluid 311 between the base arc 121 and the cornea 31 can directly press the positive pressure against the cornea 31 of the eyeball 3. At the center of the surface, a good pressure-resisting effect is achieved.

Therefore, the above description is only a preferred embodiment of the present invention, and thus does not limit the scope of the patent of the present invention. The present invention is mainly for forming a thickened layer 2 on the outer surface 11 of the lens 1 when the user blinks or When the eye is closed, the tear pressure 311 between the cornea 31 of the inner surface 12 of the lens 1 can be increased by the weight of the thickening layer 2 to apply a positive pressure to the surface of the cornea 31 of the eyeball 3, so that the central curvature of the cornea 31 is received by the inner surface 12. Base arc 121 between the cornea 31 The tear 311 is relatively flat under pressure, and the time required for reducing the refractive power of the cornea 31 can be shortened compared with the general Ortho-K lens, thereby achieving the purpose of correcting myopia, so that the structure and device that can achieve the aforementioned effects should be Subject to the scope of this creation, such simple modifications and equivalent structural changes shall be included in the scope of the patent of this creation and shall be combined with Chen Ming.

In summary, the above-mentioned corneal plastic contact lens is used to achieve its efficacy and purpose. Therefore, this creation is a new type of practicality, which is in line with the application requirements of the new patent. To file an application, I hope that the trial committee will grant the case as soon as possible to protect the creators' hard work. If there is any doubt in the arbitral tribunal, please do not hesitate to give instructions, the creator will try his best to cooperate and feel polite.

1‧‧‧ lenses

11‧‧‧ outer surface

12‧‧‧ inner surface

121‧‧‧Base arc

122‧‧‧Reversal arc

123‧‧‧Forming arc

1231‧‧‧first parallel arc

1232‧‧‧Second parallel arc

124‧‧‧Edge arc

2‧‧‧ Thickening layer

22‧‧‧Side

Claims (8)

A contact lens for a corneal shape, especially a contact lens for a night wear, comprising a lens and a thickening layer, wherein: the lens is curved and worn on a preset eyeball, and includes an outer surface and an inner surface. The inner surface is a surface of the cornea attached to the preset eyeball, and a base arc having a preset curvature and a tear between the inner surface and the cornea can be pressed against the surface of the preset cornea at the center of the inner surface, and then a reverse arc, a preparation arc and a side arc are arranged outwardly on the outer side of the base arc; a thickened layer for increasing the forward pressure on the predetermined cornea is formed on the outer surface of the lens, and the thickened layer is opposite to the base A central convex portion having an arc shape is convexly disposed at a position above the arc, and a side convex portion having an arc shape and a thin thickness is extended outside the central convex portion. The contact lens according to claim 1, wherein the lens has a circular arc shape. The contact lens according to claim 1, wherein the predetermined arc of the base curve of the inner surface is greater than the arc of the predetermined cornea horizontal arc. The contact lens of the corneal shape according to claim 1, wherein the lens has a diameter of 10.6 mm, and the optimal width of the base curve of the inner surface is 6 mm. The contact lens of the corneal shape according to claim 1, wherein the lens has a diameter of 10.6 mm, and the optimum width of the reverse arc of the inner surface is 0.6 mm. The contact lens of the corneal shape according to claim 1, wherein the preparation arc of the inner surface is a first parallel arc extending from an outer side of the reverse arc and along a curvature of the predetermined cornea, and the first parallel arc The outer side is further bent along the arc of the preset cornea to extend a second parallel arc, and the diameter of the lens is 10.6 mm, and the optimal width of the first parallel arc is 0.7 m. m, and the optimum width of the second parallel arc is 0.6 mm. The contact lens of the corneal shape according to claim 1, wherein the lens has a diameter of 10.6 mm, and the optimum width of the side arc of the inner surface is 0.4 mm. The contact lens of the corneal shape according to claim 1, wherein the thickened layer has an optimum width of 7 mm, and the central portion of the thickened layer has an optimum width of 4 mm, and the thickened layer is convex. The optimum width of the part is 1.5mm.