CN216160931U - Astigmatic contact lens - Google Patents
Astigmatic contact lens Download PDFInfo
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- CN216160931U CN216160931U CN202121636133.XU CN202121636133U CN216160931U CN 216160931 U CN216160931 U CN 216160931U CN 202121636133 U CN202121636133 U CN 202121636133U CN 216160931 U CN216160931 U CN 216160931U
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- contact lens
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Abstract
The utility model relates to a contact lens, in particular to an astigmatic contact lens. A light diffusing contact lens comprising, in order from outer to inner: a ring-shaped edge region, a non-light-transmitting region and a circular optical region. The utility model has the beneficial effects that: the astigmatic color contact lens of the present invention shields a part of the wearer's sight line by reducing the size of the optical zone, and concentrates the sight line of the astigmatic patient more, thereby further correcting astigmatism.
Description
The technical field is as follows:
the utility model relates to a contact lens, in particular to an astigmatic contact lens.
Background art:
eyes are one of the fragile organs of the human body, however, as electronic products are popularized, the time that people's eyes stay on the screen becomes longer and longer. When people enjoy the convenience brought by electronic products, the health hidden danger is brought to eyes of people. When the user stares the screen for a long time, the eyes have black eyes and pouches, the eyes are dry and painful due to too few blinking times, the eyesight is reduced due to the fact that the user looks at the mobile phone in a poor environment, oblique eyes or astigmatism are caused when the user looks at the mobile phone on the side before sleeping, and the user is prone to glaucoma even if the user looks excessively.
Astigmatism is a common refractive error of eyes, and after parallel rays enter eyes, the parallel rays cannot be converged at one point due to different refractive powers of eyeballs on different meridian lines, so that a clear object image cannot be formed, which is called astigmatism. The circle of confusion refers to that when an object point is imaged, the imaging light beam cannot converge at a point due to aberration, and forms a diffused circular projection on an image plane. The relationship between the degree of astigmatism and the minimum circle of confusion is: the larger the astigmatism is, the larger the minimum circle of dispersion is; the smaller the astigmatism is, the smaller the minimum circle of dispersion is; when the astigmatism tends to zero, the minimum circle of confusion tends to the focus. The technology of astigmatic frame lenses and astigmatic contact lenses has tended to mature to effectively correct astigmatism, but both are lens designs from the visual optical point of view.
The utility model content is as follows:
the present invention provides an astigmatic contact lens designed from the size of the optical zone to achieve astigmatism correction. The technical scheme is as follows:
a light diffusing contact lens comprising, in order from outer to inner: a ring-shaped edge region, a non-light-transmitting region and a circular optical region.
Preferably, the diameter of the circular optical zone is smaller than the diameter of the pupil of the wearer's eye. Further, the diameter of the circular optical zone is 60% of the diameter of the pupil of the wearer's eye.
Preferably, the width of the annular edge area is 0.4-0.7 mm.
Preferably, the non-light-transmitting area is printed with patterns.
The utility model has the beneficial effects that: the astigmatic color contact lens of the present invention shields a part of the wearer's sight line by reducing the size of the optical zone, and concentrates the sight line of the astigmatic patient more, thereby further correcting astigmatism.
Description of the drawings:
FIG. 1 is a schematic view of an embodiment of a astigmatic contact lens; in the figure, 1 represents a ring-shaped edge region, 2 represents a non-light-transmitting region, and 3 represents a circular optical region.
The specific implementation mode is as follows:
example (b):
a light diffusing contact lens comprising, in order from outer to inner: a ring-shaped edge region, a non-light-transmitting region and a circular optical region; the total diameter of the lens is 13.8-14.5 mm; the width of the annular edge area is 0.4-0.7 mm; patterns are printed on the non-light-transmitting areas; the diameter of the circular optical zone is less than the diameter of the pupil of the lens of the wearer, the diameter of the circular optical zone is 60% of the diameter of the pupil of the lens of the wearer, namely the diameter of the pupil of the general human eye is between 2 and 4mm, if the diameter of the pupil is 2mm, the diameter of the optical zone is 1.2mm, if the diameter of the pupil is 3mm, the diameter of the optical zone is 1.8mm, and if the diameter of the pupil is 4mm, the diameter of the optical zone is 2.4 mm; the width of the non-light-transmitting area is the total diameter of the lens minus the width of the edge area minus the diameter of the optical area.
Claims (4)
1. A light diffusing contact lens, comprising, in order from outer to inner: a ring-shaped edge region, a non-light-transmitting region and a circular optical region; the diameter of the circular optical zone is smaller than the diameter of the pupil of the wearer's eye.
2. A light diffusing contact lens according to claim 1, wherein said circular optic zone has a diameter of 60% of the diameter of the wearer's lens pupil.
3. A light diffusing contact lens according to claim 1 or 2, wherein said annular rim region has a width of 0.4-0.7 mm.
4. A light diffusing contact lens according to claim 3, wherein said opaque regions are patterned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121636133.XU CN216160931U (en) | 2021-07-19 | 2021-07-19 | Astigmatic contact lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121636133.XU CN216160931U (en) | 2021-07-19 | 2021-07-19 | Astigmatic contact lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216160931U true CN216160931U (en) | 2022-04-01 |
Family
ID=80836519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121636133.XU Active CN216160931U (en) | 2021-07-19 | 2021-07-19 | Astigmatic contact lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216160931U (en) |
-
2021
- 2021-07-19 CN CN202121636133.XU patent/CN216160931U/en active Active
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