CN206348550U - Contact lens for molding cornea - Google Patents

Abstract

The utility model provides a contact lens for cornea molding, which comprises a lens and a thickening layer, wherein the center of the inner surface of the lens is provided with a base arc, and the outer side of the base arc is sequentially provided with a reverse arc, a preparation arc and a side arc outwards, a thickening layer is formed on the outer surface of the lens, the thickening layer is convexly provided with a central convex part relative to the upper position of the base arc, and the outer side of the central convex part extends to form a side convex part with a thinner thickness, when the eye is closed, compared with general cornea plastic lens, the lens with the design can increase the whole weight by thickening layer to increase the positive pressure of tear between base arc and cornea to the surface of cornea, thereby shortening the time for flattening the cornea, thus reducing the refractive power of the cornea and achieving the purpose of reducing or eliminating the myopia degree.

Description

orthokeratology contact lenses

technical field

The utility model relates to a contact lens for shaping cornea, especially when the user closes eyes, the tear fluid between the inner surface of the lens and the cornea of the eyeball can be used to exert force on the surface of the cornea through the weight of the thickened layer on the outer surface of the lens. Positive pressure, compared with ordinary orthokeratology lenses, can shorten the flattening time of the central curvature of the cornea, so as to reduce the refractive power of the cornea, so as to achieve the purpose of correcting myopia.

Background technique

By the way, with the research and development and innovation of various electronic and electrical products, it has brought people a lot of convenience in daily life and work, especially the emergence of a large number of 3C electronic products, which has led to the popularization of applications in communications and the Internet. As a result, many people are immersed in the use of 3C electronic products and use 3C electronic products in large quantities for a long time. Whether they are office workers, students, or middle-aged and elderly people, the scope of coverage is quite wide, which in turn leads to the phenomenon of bowing their heads. As a result, many people's eyesight loss, injury and other situations are becoming more and more serious, and the myopia population is relatively increased.

Furthermore, the reason why people suffer from myopia is that the light bending ability of the eye does not match the length of the eye. Blurring occurs when visual imaging occurs, so in order to correct myopia, it is necessary to reduce the bending ability of the eye light. Since the light bending ability of the cornea accounts for about 80% of the whole eye, it is only necessary to reduce the refractive power of the cornea to achieve the effect of correcting myopia.

However, the current ways to reduce the refractive power of the cornea mainly include wearing glasses to correct myopia, wearing contact lenses to correct myopia, corneal myopia surgery, or wearing orthokeratology lenses. The above methods have their own advantages and disadvantages. Here, the orthokeratology contact lens lens is specially studied. The orthokeratology lens is made of high oxygen permeability hard material. When the lens is worn on the eyeball, the lens will contact with the outer surface of the cornea of the eyeball. A layer of unevenly distributed tears is sandwiched between them, and the epithelial cells can be flattened by the positive pressure exerted by the tears on the cornea. At the same time, if the wearer uses the eyelids to close or blink, it will rely on The weight of the eyelids and lenses exerts a certain pressure on the cornea. If the wearing time is sufficient, the central curvature of the cornea and the central epithelial layer will gradually become thinner, so that the central cornea will be flattened, thereby reducing the refractive power of the cornea. Achieve the effect of correcting the degree of myopia and even restoring normal vision.

Therefore, how to design the orthokeratology contact lens to effectively flatten the center of the cornea, reduce the refractive power of the cornea, and achieve the purpose of correcting the degree of myopia has become a subject worth studying.

Utility model content

Therefore, in view of the above deficiencies, the designer of the utility model collected relevant information, evaluated and considered in many ways, and based on years of experience accumulated in this industry, after continuous trial and modification, he designed this invisible orthokeratology New patent for glasses.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

A contact lens for orthokeratology is a contact lens for night wear, characterized in that it includes a lens and a thickening layer, wherein:

The lens is curved and worn on the preset eyeball, and includes an outer surface and an inner surface. The tears between the inner surface and the cornea can be pressed against the base curve of the preset corneal surface, and then an inversion curve, a preparation curve and a side curve are sequentially arranged outwards on the outside of the base curve;

The outer surface of the lens is formed with a thickened layer for increasing the positive pressure on the preset cornea, and the thickened layer is provided with an arc-shaped central convex portion at a position above the base arc, and the central convex portion extends outside There are arc-shaped and thin side convex parts.

The contact lens for shaping the cornea, wherein: the lens is in the shape of an arc surface.

The orthokeratology contact lens, wherein: the preset curvature of the base curve of the inner surface is larger than the preset curvature of the flattest cornea.

The orthokeratology contact lens, wherein: the diameter of the lens is 10.6mm, and the optimal width of the base curve of the inner surface is 6mm

The contact lens for corneal shaping, wherein: the diameter of the lens is 10.6 mm, and the optimal width of the inversion arc on the inner surface is 0.6 mm.

The orthokeratology contact lens, wherein: the preparation arc of the inner surface has a first parallel arc extending from the outside of the inversion arc along the curvature of the predetermined cornea, and the outside of the first parallel arc extends along the curvature of the predetermined cornea There is a second parallel arc extended by the arc bending, and the diameter of the lens is 10.6 mm, the width of the first parallel arc is 0.7 mm, and the width of the second parallel arc is 0.6 mm.

The contact lens for shaping the cornea, wherein: the diameter of the lens is 10.6mm, and the width of the edge curve of the inner surface is 0.4mm.

The contact lens for shaping orthokeratology, wherein: the width of the thickening layer is 7 mm, the width of the central convex part of the thickening layer is 4 mm, and the width of the side convex part of the thickening layer is 1.5 mm.

The main advantage of the utility model is that the lens has an outer surface and an inner surface, and a base arc with a predetermined radian is provided at the center of the inner surface, and the outer side of the base arc is provided with an inversion arc, a preparation arc and a side in sequence. 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 relative to the position above the base arc, and then a thinner side convex portion extends outside the central convex portion. When the lens When worn on the user's eyeball, an uneven tear layer will be produced between the base curve and the cornea, and when the user blinks or closes the eyes, the lens can increase the overall weight by thickening the layer to Increase the positive pressure exerted by the base arc on the corneal surface. Compared with ordinary orthokeratology lenses, it can shorten the time for the central arc of the cornea to flatten. This reduces the refractive power of the cornea and reduces or eliminates the degree of myopia. The thickness of the thick layer and the radian of the base arc determine the purpose of reducing the degree of myopia.

Another advantage of the present invention is that the position of the central convex portion of the thickened layer is above the base arc relative to the inner surface of the lens, and the thickness of the central convex portion is thicker than that of the outer lateral convex portion, so the central convex portion The weight of the head will be directly applied to the base curve, so that the base curve can directly press the positive pressure on the center of the corneal surface of the eyeball, so as to achieve the purpose of a good pressure effect.

Description of drawings

Fig. 1 is a perspective view of the utility model.

Fig. 2 is a three-dimensional appearance view of another viewing angle of the utility model.

Fig. 3 is a side sectional view of the utility model.

Fig. 4 is a side sectional view of the utility model when in use.

Description of reference signs: 1-lens; 11-outer surface; 12-inner surface; 121-base arc; 122-reverse arc; 123-preparation arc; 1231-first parallel arc; 1232-second parallel arc; 124 -edge arc; 2-thickening layer; 21-central convexity; 22-lateral convexity; 3-eyeball; 31-cornea; 311-tear fluid.

detailed description

In order to achieve the above-mentioned purpose and effect, the technical means and the structure adopted by the utility model are hereby illustrated in detail with respect to the preferred embodiments of the utility model. Its features and functions are as follows, so as to fully understand.

Please refer to Fig. 1, Fig. 2 and Fig. 3, which are the three-dimensional appearance diagram of the present utility model, the three-dimensional appearance diagram of another angle of view and the side view section view. It can be clearly seen from the figure that the utility model is a night Wearable contact lenses, including lens 1 and thickening layer 2, wherein:

The lens 1 is worn on the eyeball 3, and is arc-shaped and made of high oxygen-permeable material. It includes an outer surface 11 and an inner surface 12, and the inner surface 12 is attached to the surface of the cornea 31 of the eyeball 3. On the center of the inner surface 12, there is a base curve 121 with a predetermined curvature and through the tears 311 between the lens 1 and the cornea 31 to exert a positive pressure on the surface of the cornea 31, and then on the outside of the base curve 121 in order An inversion arc 122, a preparation arc 123 and a side arc 124 are arranged outside.

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

The preset radian of the base arc 121 of the above-mentioned inner surface 12 is greater than the flattest radian of the cornea 31 of the eyeball 3 (that is, the radian of the base arc 121 is also flatter than the flattest radian of the cornea 31), since the radian of the base arc 121 is larger than the cornea 31 31 arc, when the lens 1 is worn on the eyeball 3, it can generate a positive pressure on the epithelial cells of the cornea 31 through the tears 311 between the base arc 121 and the cornea 31; moreover, the inner surface 12 The inversion arc 122 can store the tear fluid 311 , and the effect of lifting the lens 1 to be positioned on the eyeball 3 can be achieved by virtue of the negative pressure provided by the tear fluid 311 .

And the preparation arc 123 of the above-mentioned inner surface 12 is designed along the curvature of the cornea 31 of the eyeball 3, and it has a first parallel arc 1231 attached to the surface of the cornea 31, which can be connected with the cornea through the first parallel arc 1231. 31 in close contact with the surface to enhance the positioning effect of the lens 1, and the outer side of the first parallel arc 1231 is bent and extended along the curvature of the cornea 31 to form a second parallel arc 1232, so that the second parallel arc 1232 can be used to make contact with the surface of the cornea 31 Further close contact can achieve the effect of making the lens 1 more fit on the eyeball 3; in addition, the edge arc 124 of the inner surface 12 preferably has a design with slightly raised edges, which can be used to squeeze the tears 311 when blinking, To promote the circulation of the tear fluid 311 on the inner surface 12 of the lens 1, the tear fluid 311 circulation can continuously lubricate the lens 1 and the cornea 31 of the eyeball 3 and bring in oxygen, so as to improve the comfort and wearability during wearing .

However, the width a of the base arc 121 of the inner surface 12 can be a preset length, and when the lens diameter is 10.6, the preset length is preferably 6mm; the width b of the inversion arc 122 of the inner surface 12 can be a The preset length is preferably 0.6mm; the width c of the first parallel arc 1231 of the configuration arc 123 can be a preset length, and the preset length is preferably 0.7mm; the second parallel arc of the configuration arc 123 The width d of the arc 1232 can be a preset length, preferably 0.6mm; the width e of the edge arc 124 of the inner surface 12 can be a preset length, and the preset length is preferably 0.4mm; The width x of the thick layer 2 can be a preset length, preferably 7 mm, wherein the width y of the central convex portion 21 is preferably 4 mm, and the width of the lateral convex portion 22 extending outside the central convex portion 21 is z is preferably 1.5mm. When the lens 1 is worn on the eyeball 3, the comfort and wearability during wearing can be improved by virtue of the aforementioned size.

Please also refer to the third and fourth figures together, which are the side view sectional view of the utility model and the side view sectional view during use. It can be clearly seen from the figure that when the utility model is actually used, its user is First wear the lens 1 on the eyeball 3, and make the inner surface 12 of the lens 1 stick to the surface of the cornea 31 of the eyeball 3. At this time, an uneven tear will be produced between the inner surface 12 of the lens 1 and the cornea 31 311, when the user blinks or sleeps at night and closes the eyelids (not shown), the eyelids will be pressed against the surface of the thickened layer 2, and at the same time, the weight of the eyelids, the lens 1 and the thickened layer 2 A positive pressure will be generated, and a positive pressure will be exerted on the epithelial cells at the center of the surface of the cornea 31 of the eyeball 3 by virtue of the tears 311 between the base curve 121 of the inner surface 12 and the cornea 31, and the epithelial cells on the surface of the cornea 31 Pressed by the tears 311, the central radian will gradually become flatter. By thinning the central epithelial layer of the cornea 31, the refractive power of the cornea 31 will be reduced, and the visual imaging point will move towards the direction of the retina, so as to reduce myopia. Degree or the effect of eliminating the degree of myopia.

The outer surface 11 of the lens 1 of the utility model is formed with a thickened layer 2, and the lens 1 can increase the overall weight through the thickened layer 2, so as to increase the tear fluid 311 between the base curve 121 of the inner surface 12 and the cornea 31. The positive pressure at the center of the surface of the cornea 31 of the eyeball 3, compared with ordinary orthokeratology lenses, can shorten the time for the cornea 31 to flatten, and the user can change the thickness of the thickened layer 2 and the radian of the base curve 121. Achieve the effect of adjusting the degree of myopia to be improved.

Furthermore, the position of the central convex portion 21 of the thickened layer 2 of the present invention is above the base arc 121 relative to the inner surface 12 of the lens 1. Since the thickness of the central convex portion 21 is thicker than the lateral convex portion 22 on the outside, And it is located at the upper side of the base arc 121, so the base arc 121 will directly bear the weight of the central convex part 21, so that the tears 311 between the base arc 121 and the cornea 31 can directly press the positive pressure on the cornea of the eyeball 3 31 at the center of the surface, so as to achieve a good pressure-resisting effect.

Therefore, the above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the patent scope of the present utility model. When the patient blinks or closes the eyes, the positive pressure exerted on the surface of the cornea 31 of the eyeball 3 by the tears 311 between the inner surface of the lens 12 and the cornea 31 can be increased by thickening the weight of the layer 2, so that the central curvature of the cornea 31 is affected The base curve 121 of the inner surface 12 and the tears 311 between the cornea 31 are relatively flat due to pressure. Compared with ordinary orthokeratology lenses, it can shorten the time required to reduce the refractive power of the cornea 31, so as to achieve the purpose of correcting myopia. Structures and devices that can achieve the aforementioned effects should be covered by the present invention. Such simple modifications and equivalent structural changes should be included in the scope of protection of the present invention in the same way.

Claims (8)

1. a kind of contact lenses of cornea plastotype, are the contact lenses for wearing type night, it is characterised in that including eyeglass and thickening layer, Wherein：

The eyeglass is in arc surfaced and wears on default eyeball, and including outer surface and inner surface, the inner surface is covered on default The anterior corneal surface of eyeball, and provided with the default radian of tool and the tear between inner surface and cornea is compressed at interior centre of surface In the base curve of default anterior corneal surface, then on the outside of base curve, sequentially court is externally provided with reversion arc, prepares arc and side arc；

Formed on the outer surface of the eyeglass for increase positive pressure in the thickening layer on default cornea, the thickening layer is relative to base It is convexly equipped with the central spud in arcuation at arc top position, and is extended with the outside of central spud convex in the side of arcuation and thinner thickness Portion.

2. contact lenses of cornea plastotype according to claim 1, it is characterised in that：The eyeglass is in circular arc planar.

3. contact lenses of cornea plastotype according to claim 1, it is characterised in that：The default radian of the base curve of the inner surface More than the radian of the most flat radian of default cornea.

4. contact lenses of cornea plastotype according to claim 1, it is characterised in that：The optic diameter is 10.6mm, and is somebody's turn to do The optimum width of the base curve of inner surface is then 6mm.

5. contact lenses of cornea plastotype according to claim 1, it is characterised in that：The optic diameter is 10.6mm, and is somebody's turn to do The optimum width of the reversion arc of inner surface is then 0.6mm.

6. contact lenses of cornea plastotype according to claim 1, it is characterised in that：The preparation arc of the inner surface has from anti- Turn the first parallel arc extended on the outside of arc along the radian of default cornea, and the arc on the outside of the first parallel arc further along default cornea Degree bending is extended with the second parallel arc, and the optic diameter is 10.6mm, and the width of the first parallel arc is 0.7mm, and second The width of parallel arc is 0.6mm.

7. contact lenses of cornea plastotype according to claim 1, it is characterised in that：The optic diameter is 10.6mm, and is somebody's turn to do The width of the side arc of inner surface is then 0.4mm.

8. contact lenses of cornea plastotype according to claim 1, it is characterised in that：The width of the thickening layer is 7mm, and is increased The width of the central spud of thick-layer is 4mm, and the width of the side convex portion of thickening layer is 1.5mm.