CN220154750U - Hard cornea contact lens with bionic lacrimal canal design - Google Patents
Hard cornea contact lens with bionic lacrimal canal design Download PDFInfo
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- CN220154750U CN220154750U CN202321665485.7U CN202321665485U CN220154750U CN 220154750 U CN220154750 U CN 220154750U CN 202321665485 U CN202321665485 U CN 202321665485U CN 220154750 U CN220154750 U CN 220154750U
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- lens
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- lacrimal
- lacrimal canal
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- 239000011664 nicotinic acid Substances 0.000 title claims abstract description 42
- 210000004087 cornea Anatomy 0.000 title claims abstract description 31
- 238000013461 design Methods 0.000 title claims abstract description 24
- 230000003287 optical effect Effects 0.000 claims abstract description 20
- 230000000750 progressive effect Effects 0.000 claims abstract description 8
- 230000003592 biomimetic effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 9
- 230000004438 eyesight Effects 0.000 abstract description 9
- 230000000007 visual effect Effects 0.000 abstract description 5
- 238000012937 correction Methods 0.000 abstract description 4
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- 208000001491 myopia Diseases 0.000 description 3
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- 208000003556 Dry Eye Syndromes Diseases 0.000 description 2
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- 206010021143 Hypoxia Diseases 0.000 description 2
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- 230000004430 ametropia Effects 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 208000014733 refractive error Diseases 0.000 description 2
- 206010020675 Hypermetropia Diseases 0.000 description 1
- 206010030113 Oedema Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
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- 239000007788 liquid Substances 0.000 description 1
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- Eyeglasses (AREA)
Abstract
The utility model discloses a hard contact lens with bionic lacrimal passage design, which comprises a lens main body, wherein the lens main body comprises a lens inner surface and a lens outer surface; the inner surface of the lens comprises an optical area positioned at the center, and the periphery of the optical area is sequentially provided with a bionic lacrimal canal area and an arc area which are annular. The optical area is of a progressive aspheric structure, can be matched with a cornea structure, improves visual quality, and meanwhile, better engages the bionic lacrimal canal area to improve comfort; the bionic lacrimal canal area comprises a lacrimal canal structure formed by one or more concentric rings, so that the lacrimal circulation can be promoted, the adsorptivity of the lens can be improved through the siphon effect, the positioning of the lens is ensured, and the stability of vision correction is improved; the side arc area is matched with the bionic lacrimal canal area to promote tear exchange and form an included angle with the cornea, so that the lens is prevented from being completely adsorbed on the cornea, and the lens is convenient to pick; the overall thickness of the lens is reduced through the design of the double aspheric surfaces on the front surface and the rear surface, and the wearing comfort level is further improved.
Description
Technical Field
The utility model relates to the technical field of cornea contact lenses, in particular to a hard cornea contact lens with a bionic lacrimal canal design.
Background
The contact lens is a lens which is worn on the cornea of an eyeball to correct vision or protect eyes, and is classified into a hard contact lens and a soft contact lens according to the lens material. The cornea contact lens not only brings great improvement to patients suffering from ametropia such as myopia, hyperopia, astigmatism and the like from the aspects of appearance and convenience, but also has wide visual field and vivid vision, and further plays a special role in controlling the development of teenagers' myopia and astigmatism, treating special eye diseases and the like.
However, the existing contact lens has poor wearing comfort, and poor tear fluid flow between the inner surface of the lens and the cornea of the human eye after a long wearing time, so that the eyes of a wearer are easy to feel dry, dry eye is easy to cause after long wearing, and even corneal hypoxia, edema and other membrane injuries are caused. Current rigid contact lens designs generally improve tear exchange by elevating the lens edge lift, but edge lift tends to cause the eyelid to frequently rub against the lens edge, resulting in increased foreign body sensation.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides the hard cornea contact lens with the bionic lacrimal canal design, and the bionic lacrimal canal design ensures enough tear exchange, so that the edge and the warp can be designed to be lower, foreign body sensation is reduced, meanwhile, the overall thickness of the lens is reduced through the design of double aspheric surfaces on the front surface and the rear surface, and wearing comfort is further improved.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a hard contact lens with a simulated tear canal design, comprising a lens body comprising a lens inner surface that faces the cornea of a human eye when worn and a lens outer surface opposite the lens inner surface;
the inner surface of the lens comprises an optical area positioned at the center, a circular bionic lacrimal canal area is arranged at the periphery of the optical area, and a side arc area is arranged at the outer side of the bionic lacrimal canal area;
the bionic lacrimal canal area is of a progressive aspheric structure, the section width is 0.5-3.5 mm, the standard equivalent curvature radius is 6.5-9.0 mm, and the aspheric coefficient is 0.2-0.8, and the structure is beneficial to ensuring lens positioning, so that clear and stable vision is provided;
the bionic lacrimal canal area comprises a lacrimal canal structure formed by 1-5 concentric rings, the width of each concentric ring is 0.2-0.6 mm, the lacrimal canal structure is of an aspheric structure, the equivalent curvature radius is 6.0-8.5 mm and smaller than the standard equivalent curvature radius of the bionic lacrimal canal area, the aspheric coefficient of the lacrimal canal structure is 0.3-0.7, the width and the equivalent curvature radius of each lacrimal canal can be the same or different, and the design is favorable for improving lacrimal circulation under the condition of not affecting fit and improving wearing comfort and long-term wearing safety.
Further, the optical area is of a progressive aspheric structure, the diameter of the optical area is 5.4-7.6 mm, the equivalent radius of curvature is 6.0-8.5 mm, and the aspheric coefficient is 0.3-0.7. Through designing the optical area, can realize matching cornea structure and reduce peripheral aberration, reduce dazzling light and artifact, improve the effect of vision quality, can link up bionical tear canal district again better, further improve tear circulation effect, improve the comfort level.
Further, the curvature radius of the side arc area is 10.0-12.0 mm, the edge is designed as a round angle, the round angle is in smooth transition and is connected with the inner surface and the outer surface of the lens, and the total diameter of the lens main body is 7.8-12.0 mm.
The bionic lacrimal canal area is matched with the side arc area, the structure avoids the traditional method of increasing lacrimal circulation by raising the side warp, ensures lacrimal exchange, obviously reduces foreign body sensation and improves long-term wearing safety.
Further, the outer surface of the lens is of an aspheric structure, the equivalent radius of curvature of the outer surface of the lens is 6.0-12.0 mm, the aspheric coefficient is 0.3-0.7, and the thickness of the lens main body is 0.1-0.4 mm.
The lens outer surface structure and the lens inner surface comprising the bionic lacrimal passage area form a double-aspheric structure, so that excessive increase of the thickness of the edge of the lens is avoided, the mechanical property of the lens is ensured, and meanwhile, a stable adaptation effect and good visual quality are provided.
Compared with the prior art, the utility model has the following beneficial effects:
the curvature radius of the optical area on the inner surface of the lens is matched with the cornea of a human body to a higher degree, and compared with the traditional spherical surface and common aspherical design, the peripheral phase difference, glare and artifacts can be reduced, and the visual quality is further improved; the curvature radius of the bionic lacrimal passage area is set, so that the function of tear circulation is promoted, the oxygen and nutrient supply of cornea under the lens is ensured, the adsorptivity of the lens is improved through the siphon effect, the positioning of the lens is ensured, and the stability of vision correction is improved; the curvature radius of the side arc area is larger than that of the bionic lacrimal passage area, and the side arc area forms an included angle with the cornea of a human body when being matched with the bionic lacrimal passage area to promote lacrimal fluid exchange, so that the lens is prevented from being completely adsorbed on the cornea, and the lens is convenient to pick; the overall thickness of the lens can be effectively reduced and the wearing comfort of the lens can be improved through the double-aspheric surface design of the optical areas on the inner surface and the outer surface of the lens;
through the vision correction of above-mentioned optics district, the absorption location of bionical tear canal district, limit arc district assist tear exchange reduce contained angle, two aspheric surface designs reduce lens thickness, when guaranteeing vision correction effect, avoid the cornea oxygen deficiency scheduling problem because of the unsmooth flow of tear leads to, improve the comfort level that the lens was worn.
Drawings
The utility model will be described in further detail with reference to the drawings and the specific embodiments.
FIG. 1 is a top perspective view of a rigid contact lens with a biomimetic tear channel design in accordance with the present utility model;
FIG. 2 is a cross-sectional view of a rigid contact lens with a biomimetic tear channel design in accordance with the present utility model;
wherein, the specific reference numerals are as follows: the lens comprises a lens body 1, an optical zone 2, a bionic lacrimal canal zone 3 and a side arc zone 4.
Detailed Description
The embodiment of the utility model discloses a hard cornea contact lens with a bionic tear channel design, which is shown in fig. 1 and 2, and comprises a lens main body 1, wherein the lens main body 1 comprises a lens inner surface which contacts with the cornea of a human eye when being worn and a lens outer surface opposite to the lens inner surface, the lens inner surface comprises a central optical zone 2, a bionic tear channel zone 3 which is in a circular shape outside the optical zone 2, and a side arc zone 4 which is in a circular shape outside the bionic tear channel zone 3.
The optical area 2 is of a progressive aspheric structure, the diameter is 5.4-7.6 mm, the equivalent curvature radius is 6.0-8.5 mm, and the aspheric coefficient is 0.3-0.7; in particular, the diameter of the optical zone 2 is 6.0mm, the equivalent curvature radius, the aspherical coefficient and the equivalent curvature radius and the aspherical coefficient of the cornea of the human eye are gradually matched, the path of the light is corrected through the optical zone 2, so that an object image is accurately focused on the retina, the ametropia of a myopic patient is corrected, meanwhile, the bionic lacrimal canal zone is better connected through the fluid mechanics principle, the tear circulation effect is further improved, and the comfort level is improved.
The bionic tear channel area 3 is of a progressive aspheric structure, the section width is 0.5-3.5 mm, the reference equivalent curvature radius is 6.5-9.0 mm, the aspheric coefficient is 0.2-0.8, the bionic tear channel area 3 comprises a tear channel structure formed by 1-5 concentric rings, the width of each ring is 0.2-0.6 mm, the tear channel is of an aspheric structure, the equivalent curvature radius is 6.0-8.5 mm and is smaller than the reference equivalent curvature radius of the bionic tear channel area 3, and the aspheric coefficient is 0.3-0.7; in particular, the width of the bionic lacrimal canal area 3 is 1.4mm, and the bionic lacrimal canal area comprises 2 lacrimal canal structures, wherein each lacrimal canal has the width of 0.4mm, the equivalent curvature radius of 7.5mm and the aspheric coefficient of 0.45; by setting the parameters of each ring of the bionic lacrimal passage area 3, the thickness of the lacrimal fluid layer below the lens can be adjusted, the functions of positioning the lens well and promoting tear exchange are realized, and the myopia correcting function and sufficient oxygen and nutrition supply of cornea are ensured.
The curvature radius of the side arc area 4 is 10.0-12.0 mm, and in particular, the curvature radius of the side arc area 4 is 10.5mm; the included angle between the side arc area 4 and the cornea of human eyes is lower than that between the side arc area and the cornea, so that wearing comfort is improved, and the tear liquid layer formed between the side arc area and the cornea can assist the bionic tear channel area 3 to exchange tears, so that the lens is prevented from being adsorbed on the cornea, and the lens is convenient to pick;
the total diameter of the lens body 1 is 7.8-12.0 mm, which is matched with the transverse diameter of the cornea.
The outer surface of the lens is of an aspheric structure, the equivalent radius of curvature of the outer surface of the lens is 6.0-12.0 mm, and the aspheric coefficient is 0.3-0.7, and the structure and the inner surface of the lens comprising the bionic lacrimal canal area form a double-aspheric structure together, so that the excessive increase of the thickness of the edge of the lens is avoided, the mechanical property of the lens is ensured, and meanwhile, the stable adaptation effect and good visual quality are provided;
the thickness of the lens body 1 is 0.10 to 0.40mm, and in particular, the thickness of the lens body 1 is 0.16 to 0.22mm.
In conclusion, the hard cornea contact lens with the bionic lacrimal passage design is more fit with the shape of human cornea when worn, the wearing comfort level is higher, the cornea morphology is effectively stabilized, the lens is thinner, the progressive aspheric structure is adopted, the positioning effect is good after the lens is worn, the eyesight is clear and stable, the bionic lacrimal passage structure is designed, the stable fluidity of the lacrimal passage structure is good, the problems of dry eyes and unsmooth eyes are not easy to occur after long-term wearing, and the comfort level and the safety of the lens are further increased.
The foregoing description of the utility model has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the utility model pertains, based on the idea of the utility model.
Claims (5)
1. A hard contact lens with a simulated tear canal design, comprising a lens body comprising a lens inner surface that faces the cornea of a human eye when worn and a lens outer surface opposite the lens inner surface;
the inner surface of the lens comprises an optical area positioned at the center, a circular bionic lacrimal canal area is arranged at the periphery of the optical area, and a side arc area is arranged at the outer side of the bionic lacrimal canal area;
the bionic lacrimal canal area is of a progressive aspheric structure, the section width is 0.5-3.5 mm, the standard equivalent curvature radius is 6.5-9.0 mm, and the aspheric coefficient is 0.2-0.8;
the bionic lacrimal canal area comprises a lacrimal canal structure formed by 1-5 concentric rings, the width of each concentric ring is 0.2-0.6 mm, the lacrimal canal structure is an aspheric structure, the equivalent curvature radius is 6.0-8.5 mm and is smaller than the standard equivalent curvature radius of the bionic lacrimal canal area, and the aspheric coefficient of the lacrimal canal structure is 0.3-0.7.
2. The hard contact lens with bionic tear canal design according to claim 1, wherein the optical zone is of progressive aspheric structure, the diameter of the optical zone is 5.4-7.6 mm, the equivalent radius of curvature is 6.0-8.5 mm, and the aspheric coefficient is 0.3-0.7.
3. The hard contact lens with bionic tear canal design according to claim 1, wherein the radius of curvature of the side arc area is 10.0-12.0 mm, the edge is rounded design, which smoothly transits and engages the inner and outer surfaces of the lens, and the total diameter of the lens body is 7.8-12.0 mm.
4. The hard contact lens with a simulated tear channel design of claim 1, wherein the lens outer surface is of an aspherical structure, the equivalent radius of curvature of the lens outer surface is 6.0-12.0 mm, and the aspherical coefficient is 0.3-0.7.
5. The hard contact lens with biomimetic tear channel design of claim 1, wherein the lens body has a thickness of 0.1-0.4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321665485.7U CN220154750U (en) | 2023-06-28 | 2023-06-28 | Hard cornea contact lens with bionic lacrimal canal design |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321665485.7U CN220154750U (en) | 2023-06-28 | 2023-06-28 | Hard cornea contact lens with bionic lacrimal canal design |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220154750U true CN220154750U (en) | 2023-12-08 |
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ID=89006447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321665485.7U Active CN220154750U (en) | 2023-06-28 | 2023-06-28 | Hard cornea contact lens with bionic lacrimal canal design |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220154750U (en) |
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2023
- 2023-06-28 CN CN202321665485.7U patent/CN220154750U/en active Active
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