CN115857196B - Rigid gas permeable contact lenses for myopia prevention and control - Google Patents
Rigid gas permeable contact lenses for myopia prevention and controlInfo
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- CN115857196B CN115857196B CN202211630973.4A CN202211630973A CN115857196B CN 115857196 B CN115857196 B CN 115857196B CN 202211630973 A CN202211630973 A CN 202211630973A CN 115857196 B CN115857196 B CN 115857196B
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Abstract
本发明属于眼视光技术领域，公开了一种近视防控用硬性透气角膜接触镜。该近视防控用硬性透气角膜接触镜包括镜片本体，镜片本体的前表面自中心至边缘依次同心设置有中央光学区、离焦区、离焦稳定区和前表面周边区，镜片本体的后表面自中心至边缘依次同心设置有基弧区、定位区和后表面周边区，定位区包括多个相互连接的分定位区，分定位区的定位面的纵截面形状为直线形，后表面周边区包括至少两个相互连接的分周边区。本发明提供的近视防控用硬性透气角膜接触镜，为适应复杂的角膜表面，可根据实际需要对各分定位区的倾斜角度进行调节，以提高该近视防控用硬性透气角膜接触镜与角膜的适配度，使定位更准确。
The present invention belongs to the field of ophthalmic technology, and discloses a rigid gas permeable corneal contact lens for myopia prevention and control. The rigid gas permeable corneal contact lens for myopia prevention and control comprises a lens body, the front surface of the lens body is concentrically provided with a central optical zone, a defocus zone, a defocus stabilization zone and a front surface peripheral zone from the center to the edge, and the rear surface of the lens body is concentrically provided with a base curve zone, a positioning zone and a rear surface peripheral zone from the center to the edge, the positioning zone comprises a plurality of mutually connected sub-positioning zones, the longitudinal cross-section of the positioning surface of the sub-positioning zone is a straight line, and the rear surface peripheral zone comprises at least two mutually connected sub-peripheral zones. The rigid gas permeable corneal contact lens for myopia prevention and control provided by the present invention can adjust the inclination angle of each sub-positioning zone according to actual needs to adapt to the complex corneal surface, so as to improve the compatibility of the rigid gas permeable corneal contact lens for myopia prevention and control with the cornea and make the positioning more accurate.
Description
Technical Field
The invention relates to the technical field of eye vision, in particular to a rigid breathable cornea contact lens for preventing and controlling myopia.
Background
In the prior art, the method suitable for teenagers to control myopia comprises a behavior intervention method, an optical intervention method, a medicine intervention method and the like. Most of optical intervention methods are based on peripheral myopia defocus design, and cornea shaping lenses and defocus soft lenses are commonly used. Cornea shaping is used as a method for delaying the development of teenager myopia, and a plurality of documents prove the effectiveness of the cornea shaping lens, but the cornea shaping lens has relatively more requirements on the myopia degree and cornea morphology of a patient, so that the scope of indications is limited, and the defocus soft lens is limited by the oxygen permeability of the materials used, so that the problem of dryness of the eyeball surface can occur after long-time wearing. In addition, the conventional defocus RGP (Rigid Gas Permeable Contact Lens, rigid oxygen permeable contact lens) has poor positioning property when worn on the eyeball, and the foreign body sensation caused by sliding lengthens the adaptation period of the patient.
Disclosure of Invention
The invention aims to provide a rigid breathable cornea contact lens for myopia prevention and control, which aims to improve the adaptation degree with cornea, enable positioning to be more accurate and improve wearing comfort.
To achieve the purpose, the invention adopts the following technical scheme:
a rigid gas permeable contact lens for myopia prevention and control, comprising:
The lens comprises a lens body, wherein a central optical area, a defocusing stable area and a front surface peripheral area are sequentially concentrically arranged on the front surface of the lens body from the center to the edge, a base arc area, a positioning area and a rear surface peripheral area are sequentially concentrically arranged on the rear surface of the lens body from the center to the edge, the positioning area comprises at least two mutually connected sub-positioning areas, the longitudinal section shape of a positioning surface of each sub-positioning area is a straight line shape, and the rear surface peripheral area comprises at least two mutually connected sub-peripheral areas.
Optionally, the diameter width FOZD of the central optical zone is 2mm-4mm.
Optionally, the defocus region comprises a number of interconnected defocus regions.
Optionally, the number of the separated focal regions is four, the four separated focal regions are respectively a first defocused region, a second defocused region, a third defocused region and a fourth defocused region which are connected with each other, the edge of the first defocused region, which is far away from the second defocused region, is connected with the central optical region, and the edge of the fourth defocused region, which is far away from the third defocused region, is connected with the defocused stable region.
Optionally, the diameter width (FOZD/2-FOZD 1/2) of the defocused region is 0.5mm-2mm;
The diameter width (FOZD/2-FOZD 5/2) of the defocusing stable region is 1mm-2.5mm;
the diameter width (FPD/2-FOZD/2) of the front surface peripheral region is 2mm-7mm.
Optionally, the vertex curvature radius of the base arc area is 5.55mm-7.15mm;
The radial width (BOZD) of the base arc area is 5mm-7mm.
Optionally, the positioning area includes three mutually connected sub-positioning areas, and the three sub-positioning areas are a first positioning area, a second positioning area and a third positioning area respectively, wherein the edge of the first positioning area away from the second positioning area is connected with the base arc area, and the edge of the third positioning area away from the second positioning area is connected with the peripheral area of the rear surface.
Optionally, the diameter width (BPD 1/2-BOZD/2) of the first positioning area is 0.3mm-0.7mm;
the diameter width (BPD 2/2-BPD 1/2) of the second positioning area is 0.3mm-0.7mm;
the third positioning area has a diameter width (BPD 3/2-BPD 2/2) of 0.5mm-1.1mm.
Optionally, the rear surface peripheral area includes two interconnect's branch peripheral areas, two divide the peripheral area to be first peripheral area and second peripheral area respectively, first peripheral area is kept away from the edge of second peripheral area with the location area is connected.
Optionally, the diameter width (BPD 4/2-BPD 3/2) of the first peripheral area is 0.2mm-0.25mm;
The second peripheral region has a diameter width (BPD 5/2-BPD 4/2) of 0.2mm to 0.25mm.
The invention has the beneficial effects that the positioning area comprises a plurality of mutually connected sub-positioning areas, the longitudinal section shape of the positioning surface of each sub-positioning area is linear, the linear and linear connection is flatter than the arc-shaped and arc-shaped connection in the prior art, the mechanical friction of the hard-breathable contact lens for preventing and controlling myopia to the corneal surface is reduced, the problem of visual quality caused by the fact that the human eye drives the lens to slide in instantaneous, the damage to the cornea caused by long-time wearing is avoided, the inclination angle of each sub-positioning area can be adjusted according to actual needs, so that the adaptation degree of the hard-breathable contact lens for preventing and controlling myopia to the cornea is improved, the positioning is more accurate, the peripheral area of the rear surface comprises at least two mutually connected sub-peripheral areas, the gradual and flat change from inside to outside is ensured, the compression to the corneal surface is reduced during tear exchange, and the wearing comfort of the lens is improved.
Drawings
FIG. 1 is a cross-sectional view of a rigid gas permeable contact lens for myopia prevention and control according to an embodiment of the present invention, after being worn on the cornea;
FIG. 2 is a view of an out-of-focus optical path formed after a rigid gas permeable contact lens for myopia prevention and control according to an embodiment of the present invention is worn;
FIG. 3 is a schematic view of the front surface of a lens body according to an embodiment of the present invention;
FIG. 4 is a graph of the difference in luminosity between the defocus region and the central optical zone provided by an embodiment of the present invention;
FIG. 5 is a schematic view of the rear surface of a lens body according to an embodiment of the present invention;
fig. 6 is a longitudinal cross-sectional view of a locating surface of a locating area provided in the prior art and in accordance with an embodiment of the present invention.
In the figure:
100. A lens body;
110. front surface, 111, central optical zone, 112, defocus zone, 1121, first defocus zone, 1122, second defocus zone, 1123, third defocus zone, 1124, fourth defocus zone, 113, defocus stabilization zone, 114, front surface periphery zone;
120. Rear surface, 121, base arc area, 122, location area, 1221, first location area, 1222, second location area, 1223, third location area, 123, rear surface peripheral area, 1231, first peripheral area, 1232, second peripheral area;
200. Cornea, 300, retina, 400, imaging plane, 500, macular area.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may, for example, be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
The embodiment provides a hard breathable contact lens for preventing and controlling myopia, wherein a lens body of the hard breathable contact lens for preventing and controlling myopia is made of a high-oxygen-permeability hard material, so that oxygen permeability is improved, firmness of the material is guaranteed, and meanwhile, the hard breathable contact lens for preventing and controlling myopia combines a peripheral defocusing design, so that light rays form myopia defocusing on the periphery of retina after passing through the lens body and eyeball.
Specifically, as shown in fig. 1-3 and 5, the rigid air permeable contact lens for preventing and controlling myopia comprises a lens body 100, a central optical zone 111, a defocus zone 112, a defocus stabilization zone 113 and a front surface peripheral zone 114 are concentrically arranged on a front surface 110 of the lens body 100 in sequence from the center to the edge, a base arc zone 121, a positioning zone 122 and a rear surface peripheral zone 123 are concentrically arranged on a rear surface 120 of the lens body 100 in sequence from the center to the edge, the positioning zone 122 comprises a plurality of mutually connected sub-positioning zones, the longitudinal section of a positioning surface of each sub-positioning zone is in a straight line shape, and the rear surface peripheral zone 123 comprises at least two mutually connected sub-peripheral zones.
The positioning area 122 comprises a plurality of mutually connected sub-positioning areas, the longitudinal section shape of the positioning surface of each sub-positioning area is linear, the linear and linear connection is flatter than the arc-shaped connection in the prior art, the mechanical friction of the hard air-permeable contact lens for preventing and controlling myopia on the surface of the cornea 200 is reduced, the problem of visual quality caused by the fact that a human eye drives the lens body 100 to slide in instantaneous eyes is effectively prevented, the damage to the cornea 200 caused by long-time wearing is avoided, the inclination angle of each sub-positioning area can be adjusted according to actual needs, so that the matching degree of the hard air-permeable contact lens for preventing and controlling myopia and the cornea 200 is improved, the positioning is more accurate, the peripheral area 123 of the rear surface comprises at least two mutually connected sub-peripheral areas, the gradual and flat change from inside to outside is ensured, the compression on the surface of the cornea 200 is reduced during tear exchange, and the comfort of the lens is improved.
Referring to fig. 3, fig. 3 is a schematic structural diagram of the front surface 110 of the lens body 100 according to the embodiment of the present invention, optionally, the diameter width FOZD of the central optical zone 111 is 2mm-4mm, and the central optical zone 111 is configured to ensure that when external light passes through the zone and the eyeball, the external light is imaged at a relatively central position of the retina 300, so as to achieve a clear visual effect. In this embodiment, the central optical area 111 may be spherical or aspherical. With respect to the lens body 100 of high power, setting the central optical zone 111 to be aspherical has a certain effect on aberration correction.
In this embodiment, the defocus region 112 comprises a plurality of interconnected defocus regions. The plurality of mutually connected separated focal areas are arranged, so that the effect of gradually increasing the defocusing degree is achieved. Illustratively, the number of split focal zones may be set to 1-11.
Further, the number of the separated focal regions is preferably four, and the four separated focal regions are respectively a first defocused region 1121, a second defocused region 1122, a third defocused region 1123 and a fourth defocused region 1124 which are connected with each other, wherein the edge of the first defocused region 1121 far from the second defocused region 1122 is connected with the central optical region 111, and the edge of the fourth defocused region 1124 far from the third defocused region 1123 is connected with the defocused stable region 113. In other embodiments, the number of the separated focal zones may be set to be other, such as 3 or 11, etc., as needed.
Alternatively, the defocus region 112 has a diameter width (FOZD/2-FOZD 1/2) of 0.5mm-2mm, the defocus stabilization region 113 has a diameter width (FOZD/2-FOZD 5/2) of 1mm-2.5mm, the luminosity in this region is everywhere equal to achieve a steady state of defocus, and the front surface peripheral region 114 has a diameter width (FPD/2-FOZD 6/2) of 2mm-7mm. Referring to fig. 2, the macular region 500 is the most sensitive region of vision, in which cone cells responsible for vision and color vision are distributed, and the peripheral region 114 of the front surface has a larger luminosity than the central optical region 111, so that a peripheral defocus effect is generated, and the peripheral defocus can enable an object image outside the central visual field to be projected onto the peripheral retina 300 or the front part to form an imaging plane 400, so that the occurrence of hyperopic defocus can be reduced, and a myopia prevention and control effect can be achieved.
As shown in fig. 4, fig. 4 is a graph of the difference in luminosity between the defocus region 112 and the central optical zone 111 provided by an embodiment of the present invention. In the figure, ADD is not equal to a value of zero, representing the difference between the luminosity of each split focal region and the luminosity of the central optical region 111. ADD preferably ranges from 1D to 6D, with a step size of 0.5D. Width represents the radial Width of the central optical zone 111, the first defocus region 1121, the second defocus region 1122, the third defocus region 1123, and the fourth defocus region 1124. Preferably, the radial width of each split focal zone is equal to the radial width of the defocus zone 112 (FOZD/2-FOZD 1/2) divided by the number of split focal zones.
Referring to fig. 5, fig. 5 is a schematic structural diagram of the rear surface 120 of the lens body 100 according to an embodiment of the present invention, optionally, the radius of curvature of the vertex of the base arc area 121 is 5.55mm-7.15mm, and the radial width (BOZD) of the base arc area 121 is 5mm-7mm, so as to provide enough design space for the positioning area 122. The base curve 121 is also called an optical zone, and when the rigid gas permeable contact lens for preventing and controlling myopia is worn, a certain tear liquid layer is left between the base curve 121 and the front surface 110 of the cornea 200, so as to avoid the problem that the cornea 200 is anoxic or pressed after the lens body 100 is in direct contact with the cornea 200 for a long time. Illustratively, the base arc area 121 may be configured as a spherical surface or an aspherical surface, as may be required in practice.
Preferably, the positioning area 122 includes three mutually connected sub-positioning areas, namely, a first positioning area 1221, a second positioning area 1222 and a third positioning area 1223, wherein an edge of the first positioning area 1221 away from the second positioning area 1222 is connected with the base arc area 121, and an edge of the third positioning area 1223 away from the second positioning area 1222 is connected with the rear surface peripheral area 123. As shown in fig. 6, fig. 6 is a longitudinal section view of a positioning surface of the positioning area 122 provided by the prior art and the embodiment of the present invention, where a solid line is a longitudinal section shape of the positioning surface of the positioning area 122 in the prior art, a dotted line is a longitudinal section shape of the positioning surface of the positioning area 122 in the embodiment, θ1 is an included angle between a first positioning surface of the first positioning area 1221 and a vertical line, θ2 is an included angle between a second positioning surface of the second positioning area 1222 and a vertical line, and θ3 is an included angle between a third positioning surface of the third positioning area 1223 and a vertical line, and it can be known from the figure that by making the longitudinal section shape of the positioning surface of the positioning area of each sub-positioning area be a straight line, a transition between each sub-positioning area is flatter, a mechanical friction between each sub-positioning area and the cornea 200 is reduced, and damage to the surface of the cornea 200 is avoided due to long-time wearing. In other embodiments, the number of the positioning areas may be set to be other, for example, 2 or 4, as required.
Optionally, the first location area 1221 has a diameter width (BPD 1/2-BOZD/2) of 0.3mm-0.7mm, the second location area 1222 has a diameter width (BPD 2/2-BPD 1/2) of 0.3mm-0.7mm, and the third location area 1223 has a diameter width (BPD 3/2-BPD 2/2) of 0.5mm-1.1mm to better fit the size of the cornea 200.
The rear surface peripheral region 123 includes two mutually connected divided peripheral regions, namely a first peripheral region 1231 and a second peripheral region 1232, and the edge of the first peripheral region 1231 away from the second peripheral region 1232 is connected to the positioning region 122. The arrangement of the peripheral area 123 on the rear surface ensures that after the lens body 100 is worn, good tear exchange can be performed to maintain the health of the cornea 200, and the peripheral area 123 on the rear surface is arranged as the first peripheral area 1231 and the second peripheral area 1232 to make the lifting of the periphery more gentle, ensure good tear exchange, and simultaneously reduce the compression on the surface of the cornea 200 and improve the comfort of lens fitting. Alternatively, the first peripheral region 1231 and the second peripheral region 1232 may be provided as spherical or may be provided as aspherical, such as a tangential structure, as desired.
Preferably, the first peripheral region 1231 has a diameter width (BPD 4/2-BPD 3/2) of 0.2mm-0.25mm and the second peripheral region 1232 has a diameter width (BPD 5/2-BPD 4/2) of 0.2mm-0.25mm.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (8)
1. A rigid gas permeable contact lens for myopia prevention and control, comprising:
The lens comprises a lens body (100), wherein a central optical area (111), a defocusing area (112), a defocusing stable area (113) and a front surface peripheral area (114) are sequentially and concentrically arranged on the front surface (110) of the lens body (100) from the center to the edge, a base arc area (121), a positioning area (122) and a rear surface peripheral area (123) are sequentially and concentrically arranged on the rear surface (120) of the lens body (100) from the center to the edge, the positioning area (122) comprises at least two mutually connected sub-positioning areas, the longitudinal section shape of a positioning surface of each sub-positioning area is a straight line shape, and the rear surface peripheral area (123) comprises at least two mutually connected sub-peripheral areas;
The rear surface peripheral region (123) comprises two mutually connected divided peripheral regions, namely a first peripheral region (1231) and a second peripheral region (1232), and the edge of the first peripheral region (1231) far away from the second peripheral region (1232) is connected with the positioning region (122);
The positioning area (122) comprises three mutually connected sub-positioning areas, wherein the three sub-positioning areas are a first positioning area (1221), a second positioning area (1222) and a third positioning area (1223) respectively, the first positioning area (1221) is far away from the edge of the second positioning area (1222) and is connected with the base arc area (121), and the third positioning area (1223) is far away from the edge of the second positioning area (1222) and is connected with the rear surface peripheral area (123).
2. A rigid gas permeable contact lens for myopia prevention and control according to claim 1, wherein the diameter width FOZD of the central optical zone (111) is 2mm-4mm.
3. A rigid gas permeable contact lens for myopia prevention and control according to claim 1, wherein the defocus region (112) comprises a plurality of interconnected defocus regions.
4. A rigid gas permeable contact lens for myopia prevention and control according to claim 3, wherein the number of said separated focal zones is four, and the four separated focal zones are respectively a first defocused zone (1121), a second defocused zone (1122), a third defocused zone (1123) and a fourth defocused zone (1124) which are connected to each other, wherein the edge of the first defocused zone (1121) away from the second defocused zone (1122) is connected to the central optical zone (111), and the edge of the fourth defocused zone (1124) away from the third defocused zone (1123) is connected to the defocused stable zone (113).
5. The rigid gas permeable contact lens for myopia prevention and control according to claim 1, wherein the diameter width (FOZD/2-FOZD 1/2) of the defocus region (112) is 0.5mm-2mm;
The diameter width (FOZD 6/2-FOZD 5/2) of the defocusing stable region (113) is 1mm-2.5mm;
The front surface peripheral region (114) has a diameter width (FPD/2-FOZD/2) of 2mm-7mm.
6. A rigid gas permeable contact lens for myopia prevention and control according to claim 1, wherein the apex radius of curvature of the base curve area (121) is 5.55mm-7.15mm;
the radial width (BOZD) of the base arc area (121) is 5mm-7mm.
7. A rigid gas permeable contact lens for myopia prevention and control according to claim 1, wherein the first positioning zone (1221) has a diameter width (BPD 1/2-BOZD/2) of 0.3mm-0.7mm;
the second positioning area (1222) has a diameter width (BPD 2/2-BPD 1/2) of 0.3mm-0.7mm;
the third positioning area (1223) has a diameter width (BPD 3/2-BPD 2/2) of 0.5mm-1.1mm.
8. A rigid gas permeable contact lens for myopia prevention and control according to claim 1, wherein the diameter width (BPD 4/2-BPD 3/2) of the first peripheral zone (1231) is 0.2mm-0.25mm;
The second peripheral region (1232) has a diameter width (BPD 5/2-BPD 4/2) of 0.2mm to 0.25mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211630973.4A CN115857196B (en) | 2022-12-19 | 2022-12-19 | Rigid gas permeable contact lenses for myopia prevention and control |
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| CN202211630973.4A CN115857196B (en) | 2022-12-19 | 2022-12-19 | Rigid gas permeable contact lenses for myopia prevention and control |
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| CN115857196B true CN115857196B (en) | 2025-10-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208270872U (en) * | 2017-04-30 | 2018-12-21 | 欧普康视科技股份有限公司 | Correct the hard corneal contact lens of irregular cornea eyesight |
| CN114391121A (en) * | 2019-09-12 | 2022-04-22 | 香港理工大学 | Lenses and methods for retarding myopia progression |
| CN216772131U (en) * | 2022-03-03 | 2022-06-17 | 上海艾康特医疗科技有限公司 | Scleral mirror |
| CN114740636A (en) * | 2021-01-07 | 2022-07-12 | 爱博诺德(北京)医疗科技股份有限公司 | Ophthalmic lens worn outside the eye |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2994608T3 (en) * | 2012-08-10 | 2025-01-27 | Osio Corp D/B/A Yolia Health | Contact lens use in the treatment of an ophthalmologic condition |
| CN212694190U (en) * | 2020-02-27 | 2021-03-12 | 李宪亭 | Defocusing soft lens |
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- 2022-12-19 CN CN202211630973.4A patent/CN115857196B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208270872U (en) * | 2017-04-30 | 2018-12-21 | 欧普康视科技股份有限公司 | Correct the hard corneal contact lens of irregular cornea eyesight |
| CN114391121A (en) * | 2019-09-12 | 2022-04-22 | 香港理工大学 | Lenses and methods for retarding myopia progression |
| CN114740636A (en) * | 2021-01-07 | 2022-07-12 | 爱博诺德(北京)医疗科技股份有限公司 | Ophthalmic lens worn outside the eye |
| CN216772131U (en) * | 2022-03-03 | 2022-06-17 | 上海艾康特医疗科技有限公司 | Scleral mirror |
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