CN202490048U - Double curved surface artificial lens - Google Patents
Double curved surface artificial lens Download PDFInfo
- Publication number
- CN202490048U CN202490048U CN2012200703179U CN201220070317U CN202490048U CN 202490048 U CN202490048 U CN 202490048U CN 2012200703179 U CN2012200703179 U CN 2012200703179U CN 201220070317 U CN201220070317 U CN 201220070317U CN 202490048 U CN202490048 U CN 202490048U
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- spherical aberration
- toroid
- zero
- intraocular lens
- zero spherical
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Abstract
The utility model discloses a double curved surface artificial lens comprising a lens body, wherein the surface of the lens body is composed of two biconvex round surfaces, one round surface is an aspheric surface with a zero spherical aberration, and the other surface is a double curved surface with the zero spherical aberration. A face type of the surface of the lens is improved by the double curved surface artificial lens, and therefore the zero spherical aberration is achieved, and the problem that a visual quality is influenced due to slight eccentricity or incline of the artificial lens is solved.
Description
Technical field
This utility model relates to a kind of intraocular lens, especially a kind of toroid intraocular lens.
Background technology
Cataract operation is to extract muddy crystalline lens through operation method, and the implantable artificial crystalline lens is recovered lost eyesight the patient, obtains good vision recovery simultaneously.Part patient can not obtain best vision because self corneal astigmatism uses sphere or aspheric intraocular lens astigmatism fully merely.Sphere intraocular lens and the negative spherical aberration aspheric intraocular lens optical quality after slight off-centre will be lower than the intraocular lens of zero spherical aberration design.Clinical and experimentation shows that all kinds of intraocular lenss that implant ophthalmic can have in various degree eccentric or inclination, particularly toroid intraocular lens off-centre bigger to the visual quality influence.
The utility model content
This utility model technical issues that need to address provide a kind of toroid intraocular lens to the visual quality influence that can effectively reduce off-centre or inclination.
For addressing the above problem; The technical scheme that this utility model is taked is: a kind of toroid intraocular lens, comprise lens body, and lens surface mainly is made up of two biconvex rounded face; One of them rounded face is zero spherical aberration aspheric surface, and another face is zero spherical aberration toroid.
Said zero aspheric each radial line curvature of spherical aberration equates.
Two radial line R1, the R2 radius of curvature that said zero spherical aberration toroid differs 90 degree is unequal and be zero spherical aberration.
Said zero spherical aberration aspheric surface provides intraocular lens's concave-sphere number of degrees jointly with zero spherical aberration toroid.
Two radial line R1, R2 diopter difference that said zero spherical aberration curved surface differs 90 degree are astigmatism degree.
Adopt the beneficial effect that technique scheme produced to be: this utility model makes it reach zero spherical aberration through improving lens surface, thereby has avoided the intraocular lens in slight off-centre or after tilting, and influences visual quality.
Description of drawings
Fig. 1 is this utility model structural representation;
Fig. 2 is this utility model zero spherical aberration non-spherical structure sketch map;
Fig. 3 is this utility model zero spherical aberration foroid structure sketch map;
Wherein: 1, lens body, 2, radial line A, 3, radial line B, 4, radial line R1,5, radial line R2.
The specific embodiment
Below in conjunction with accompanying drawing this utility model is done and to be described in further detail:
As shown in Figure 1, a kind of toroid intraocular lens comprises lens body 1, and lens surface mainly is made up of two biconvex rounded face, and one of them rounded face is zero spherical aberration aspheric surface, and another face is zero spherical aberration toroid.
As shown in Figure 2, the zero aspheric radial line A of spherical aberration, radial line B equate that each radial line curvature equates, astigmatism degree is not provided.
As shown in Figure 3, two the radial line R1, the radial line R2. radius of curvature that on zero spherical aberration curved surface, differ 90 degree are unequal, and are zero spherical aberration, are used to provide astigmatism degree.
Above-mentioned zero spherical aberration aspheric surface provides intraocular lens's concave-sphere number of degrees jointly with zero spherical aberration toroid.Two radial line R1, R2 diopter that zero spherical aberration curved surface differs 90 degree provide astigmatism degree.In the practical application, two faces all can be used as front or back.Be applicable to the cataract operation that needs to correct corneal astigmatism.
Claims (5)
1. a toroid intraocular lens comprises lens body, it is characterized in that: lens surface mainly is made up of two biconvex rounded face, and one of them rounded face is zero spherical aberration aspheric surface, and another face is zero spherical aberration toroid.
2. toroid intraocular lens according to claim 1 is characterized in that said zero aspheric each radial line curvature of spherical aberration equates.
3. toroid intraocular lens according to claim 1 is characterized in that two radial line R1, R2 radius of curvature that said zero spherical aberration toroid differs 90 degree are unequal and is zero spherical aberration.
4. toroid intraocular lens according to claim 1 is characterized in that said zero spherical aberration aspheric surface and zero spherical aberration toroid provide intraocular lens's concave-sphere number of degrees jointly.
5. toroid intraocular lens according to claim 1 is characterized in that two radial line R1, R2 diopter difference that said zero spherical aberration curved surface differs 90 degree are astigmatism degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200703179U CN202490048U (en) | 2012-02-29 | 2012-02-29 | Double curved surface artificial lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200703179U CN202490048U (en) | 2012-02-29 | 2012-02-29 | Double curved surface artificial lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202490048U true CN202490048U (en) | 2012-10-17 |
Family
ID=46996294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200703179U Expired - Fee Related CN202490048U (en) | 2012-02-29 | 2012-02-29 | Double curved surface artificial lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202490048U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104783925A (en) * | 2015-01-09 | 2015-07-22 | 爱博诺德（北京）医疗科技有限公司 | Multi-focal artificial lens |
| CN108431676A (en) * | 2015-11-24 | 2018-08-21 | 阿库福库斯公司 | The double-curved surface microstome intraocular lens of depth of focus with extension |
-
2012
- 2012-02-29 CN CN2012200703179U patent/CN202490048U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104783925A (en) * | 2015-01-09 | 2015-07-22 | 爱博诺德（北京）医疗科技有限公司 | Multi-focal artificial lens |
| CN108431676A (en) * | 2015-11-24 | 2018-08-21 | 阿库福库斯公司 | The double-curved surface microstome intraocular lens of depth of focus with extension |
| CN108431676B (en) * | 2015-11-24 | 2022-01-04 | 阿库福库斯公司 | Toric small-aperture intraocular lens with extended depth of focus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121017 Termination date: 20130229 |