CN217506292U - Hard corneal contact lens - Google Patents
Hard corneal contact lens Download PDFInfo
- Publication number
- CN217506292U CN217506292U CN202123325185.8U CN202123325185U CN217506292U CN 217506292 U CN217506292 U CN 217506292U CN 202123325185 U CN202123325185 U CN 202123325185U CN 217506292 U CN217506292 U CN 217506292U
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- Prior art keywords
- lens
- area
- wearing
- optical
- arc
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- 230000003287 optical effect Effects 0.000 claims abstract description 42
- 210000004087 cornea Anatomy 0.000 claims abstract description 16
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 230000004379 myopia Effects 0.000 description 5
- 208000001491 myopia Diseases 0.000 description 5
- 230000004438 eyesight Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 210000000744 eyelid Anatomy 0.000 description 3
- 201000009310 astigmatism Diseases 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000035764 nutrition Effects 0.000 description 2
- 235000016709 nutrition Nutrition 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 210000001747 pupil Anatomy 0.000 description 2
- 210000001525 retina Anatomy 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010020675 Hypermetropia Diseases 0.000 description 1
- 208000029091 Refraction disease Diseases 0.000 description 1
- 230000004430 ametropia Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 208000030533 eye disease Diseases 0.000 description 1
- 201000006318 hyperopia Diseases 0.000 description 1
- 230000004305 hyperopia Effects 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004423 myopia development Effects 0.000 description 1
- 208000014733 refractive error Diseases 0.000 description 1
Images
Abstract
The utility model discloses a hard contact lens, which comprises a lens inner surface facing the cornea of human eyes when being worn and a lens outer surface opposite to the lens inner surface, wherein the lens inner surface comprises an optical area positioned in the center, a circular ring-shaped wearing arc area is arranged at the periphery of the optical area, and a circular ring-shaped edge arc area is arranged outside the wearing arc area; the diameter of the optical area is 6.4-8.4mm, and the curvature radius of the optical area is 6.2-9.00 mm; the curvature radius of the wearing arc area is larger than that of the optical area; the curvature radius of the side arc area is larger than that of the wearing arc area. The product effectively improves the wearing comfort of a user, is convenient for removing the lens and does not influence the center positioning effect of the lens.
Description
Technical Field
The utility model relates to the technical field of lenses, concretely relates to rigid corneal contact lens.
Background
The contact lenses are divided into hard contact lenses, soft contact lenses and air-permeable hard lenses according to the material of the lenses, the contact lenses not only bring great improvement to patients with ametropia such as myopia, hyperopia and astigmatism from the aspects of appearance and convenience, but also have wide visual field and vivid visual objects, and also play special efficacies in the aspects of controlling the development of myopia and astigmatism of teenagers, treating special eye diseases and the like.
However, the wearing comfort of the existing hard corneal contact lens is poor, and after the lens is worn for a long time, eyes of a wearer feel dry easily, the comfort is low, and the eyes are easily injured.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the utility model provides a rigid corneal contact lens, which effectively improves the wearing comfort level of a user, is convenient for removing the lens and does not influence the center positioning effect of the lens.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a hard contact lens, which comprises a lens inner surface facing the cornea of human eyes when being worn and a lens outer surface opposite to the lens inner surface, wherein the lens inner surface comprises an optical area positioned in the center, the periphery of the optical area is provided with a circular wearing arc area, and the outer side of the wearing arc area is provided with a circular edge arc area;
the diameter of the optical area is 6.4-8.4mm, and the curvature radius of the optical area is 6.2-9.00 mm;
the radius of curvature of the wearing arc area is larger than that of the optical area, and the radius of curvature of the wearing arc area is 7.4-11.0 mm;
the curvature radius of the side arc area is larger than that of the wearing arc area.
The further improvement is that the curvature radius of the side arc area is 12.5-14.0 mm.
In a further improvement, the radius of the side arc area is 0.05-0.2mm, and the total diameter of the lens is 7.9-11.2 mm.
By setting the parameters of the side arc area, a rake angle is formed between the side arc area and the front surface of the cornea of the human eye, which is not only beneficial to the circulation and exchange of tears, but also convenient for the lens removal.
In a further improvement, the outer surface of the lens is of a spherical structure, and the radius of curvature of the outer surface of the lens is 6.0-10.0 mm.
By setting the parameters of the outer surface of the lens, the comfort level of the user when the eyelid of the user is in wearing contact with the outer surface of the lens is improved.
In a further improvement, the optical zone center thickness is 0.10-0.69mm, and the wearing arc zone gradually decreases from the direction close to the optical zone to the direction far away from the optical zone.
Because the wearing arc zone does not play the role of improving the image quality in optics, the wearing arc zone is gradually thinned, on one hand, the center positioning effect of the optical zone in the lens is not influenced, and on the other hand, the comfort degree of the lens when being worn is improved.
Compared with the prior art, the utility model discloses following beneficial effect has:
the inner surface of the hard corneal contact lens of the utility model is designed into three arc zones, namely an optical zone, a wearing arc zone and a side arc zone; the curvature radius of the optical area is matched with the curvature radius of the center of the cornea of the human body, the diameter of the optical area is matched with the diameter of the pupil of the eye of the human body, and the optical area refracts light rays to enable an object image to be displayed on a retina, so that the vision of a myope can be corrected; the curvature radius of the wearing arc area is set, so that the wearing tightness of the lens is adjusted, the wearing arc area is ensured to be in contact with the cornea of a human body, the central positioning function of the lens is promoted, the myopia correction function is ensured, meanwhile, larger pressure is not generated between the wearing arc area and the cornea of the human body, and the wearing comfort of the lens is ensured; the edge arc area is positioned at the outermost section of the lens, the curvature radius of the edge arc area is larger than that of the wearing arc area, and an outward-tilting annular section is formed between the edge arc area and the cornea of the human eye to absorb fresh tear, promote the interaction between the fresh tear and the tear under the lens, provide oxygen and nutrition for the cornea under the lens and facilitate the removal of the lens;
the tear water exchange is realized through the vision correction of the optical zone, the adhesion tension of the wearing arc zone and the side arc zone, the wearing comfort of a user is effectively improved, the lens can be removed conveniently, the center positioning effect of the lens is guaranteed, and the myopia correction function is guaranteed.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a bottom projection view of a medium hard contact lens of the present invention;
fig. 2 is a longitudinal cross-sectional view of a medium hard corneal contact lens of the present invention;
wherein, the specific reference numbers are: the lens comprises a lens 1, an optical area 2, a wearing arc area 3 and a side arc area 4.
Detailed Description
The embodiment of the utility model discloses a hard contact lens, as shown in figure 1 and figure 2, the lens 1 comprises a lens inner surface facing the cornea of human eyes when being worn and a lens outer surface opposite to the lens inner surface, the lens inner surface comprises an optical area 2 positioned at the center, the periphery of the optical area 2 is provided with a circular wearing arc area 3, and the outer side of the wearing arc area 3 is provided with a circular edge arc area 4;
the diameter of the optical area 2 is 6.4-8.4mm, the curvature radius of the optical area 2 is 6.2-9.00mm, the curvature radius of the optical area 2 is matched with the curvature radius of the center of a human cornea, the diameter of the optical area 2 is matched with the diameter of a pupil of an eye of a human body, and light is refracted through the optical area 2, so that an object image is presented on a retina, and the vision of a myope is corrected;
the curvature radius of the wearing arc area 3 is larger than that of the optical area 2, the curvature radius of the wearing arc area 3 is 7.4-11.0mm, the wearing tightness of the lens 1 is adjusted by setting the curvature radius of the wearing arc area 3, the wearing arc area 3 is guaranteed to be in contact with the cornea of a human body, the central positioning function of the lens 1 is promoted, the myopia correction function is guaranteed, meanwhile, large pressure is not generated between the wearing arc area 3 and the cornea of the human body, and the wearing comfort of the lens 1 is guaranteed;
the curvature radius of the side arc area 4 is larger than that of the wearing arc area 3, the side arc area 4 is located at the outermost section of the lens 1, the curvature radius of the side arc area 4 is larger than that of the wearing arc area 3, an outward tilting annular section is formed between the side arc area 4 and the cornea of a human eye, so that fresh tears are absorbed, the interaction of the fresh tears and the tears under the lens 1 is promoted, oxygen and nutrition are provided for the cornea under the lens 1, and meanwhile, the lens 1 is convenient to remove.
Wherein the curvature radius of the side arc area 4 is 12.5-14.0mm, the radius of the side arc area 4 is 0.05-0.2mm, and the total diameter of the lens 1 is 7.9-11.2 mm.
By setting the parameters of the side arc area 4, a rake angle is formed between the side arc area 4 and the front surface of the cornea of the human eye, which is not only beneficial to the circulation and exchange of tears, but also convenient for the removal of the lens 1.
Wherein, the outer surface of the lens 1 is of a spherical structure, and the curvature radius of the outer surface of the lens 1 is 6.0-10.0 mm.
By setting the parameters of the outer surface of the lens 1, the comfort level of the eyelid of a user when the eyelid of the user is in wearing contact with the outer surface of the lens 1 is improved.
Wherein, the central thickness of the optical area 2 is 0.10-0.69mm, and the thickness of the wearing arc area 3 is gradually reduced from the direction close to the optical area 2 to the direction far away from the optical area 2.
Because wear arc 3 and do not play the effect of improving the image quality in optics, consequently, wear arc 3 and carry out progressively thinization processing, can not influence the central localization effect to optical zone 2 in lens 1 on the one hand, on the other hand has promoted the comfort level when lens 1 wears.
The inner surface of the hard corneal contact lens of the utility model is designed into three segments of arc zones, namely an optical zone 2, a wearing arc zone 3 and a side arc zone 4; the tear water exchange is realized through the vision correction of the optical zone 2, the adhesion tension of the wearing arc zone 3 and the side arc zone 4, the wearing comfort of a user is effectively improved, the lens 1 can be removed conveniently, the center positioning effect of the lens 1 is also ensured, and the myopia correction function is further ensured.
It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical personnel in the technical field of the utility model, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replace.
Claims (5)
1. The hard contact lens is characterized by comprising a lens inner surface facing to the cornea of a human eye when being worn and a lens outer surface opposite to the lens inner surface, wherein the lens inner surface comprises an optical area positioned at the center, a circular wearing arc area is arranged at the periphery of the optical area, and a circular side arc area is arranged at the outer side of the wearing arc area;
the diameter of the optical area is 6.4-8.4mm, and the curvature radius of the optical area is 6.2-9.00 mm;
the wearing arc zone curvature radius is larger than the optical zone curvature radius;
the curvature radius of the side arc area is larger than that of the wearing arc area.
2. The hard contact lens of claim 1, wherein the radius of curvature of the side arc is 12.5-14.0 mm.
3. A rigid contact lens according to claim 1 or 2, wherein the radius of the side arc is 0.05-0.2mm and the total diameter of the lens is 7.9-11.2 mm.
4. The hard contact lens of claim 1, wherein the outer lens surface is a spherical structure.
5. The hard contact lens of claim 1, wherein the optical zone has a central thickness of 0.10-0.69mm, and the wearing zone has a thickness gradually decreasing from the position close to the optical zone to the position away from the optical zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123325185.8U CN217506292U (en) | 2021-12-27 | 2021-12-27 | Hard corneal contact lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123325185.8U CN217506292U (en) | 2021-12-27 | 2021-12-27 | Hard corneal contact lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217506292U true CN217506292U (en) | 2022-09-27 |
Family
ID=83342931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123325185.8U Active CN217506292U (en) | 2021-12-27 | 2021-12-27 | Hard corneal contact lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217506292U (en) |
-
2021
- 2021-12-27 CN CN202123325185.8U patent/CN217506292U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231203 Address after: 610041 Room 105, Room 106, Room 405-1, Room 406, 1st Floor, Building 2, No. 33, Wuqing South Road, Wuhou District, Chengdu City, Sichuan Province Patentee after: SICHUAN XINGTAI PULE MEDICAL TECHNOLOGY CO.,LTD. Address before: 200131 floor 1, building 2, No. 361, fasai Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Patentee before: Jingmou Biotechnology (Shanghai) Co.,Ltd. |
|
| TR01 | Transfer of patent right |