ES2012535A6 - Varifocal ophthalmic lens - Google Patents
Varifocal ophthalmic lensInfo
- Publication number
- ES2012535A6 ES2012535A6 ES8802439A ES8802439A ES2012535A6 ES 2012535 A6 ES2012535 A6 ES 2012535A6 ES 8802439 A ES8802439 A ES 8802439A ES 8802439 A ES8802439 A ES 8802439A ES 2012535 A6 ES2012535 A6 ES 2012535A6
- Authority
- ES
- Spain
- Prior art keywords
- point
- meridian curve
- varifocal
- vision zone
- ophthalmic lens
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Eyeglasses (AREA)
Abstract
In this lens, the curvature of the principal meridian curve MP begins to change starting from a point A3 located in the intermediate vision zone VI at a predetermined distance d1 from the point A1 on the meridian curve MP located at the lower limit of the distance vision zone VL and a point A4 continues to change located on the line of close vision VP in an extension MP' of the meridian curve MP at a predetermined distance d2 from the point A2 on the meridian curve MP located at the upper limit of the close vision zone VP, with the difference in curvature between the points A2 and A4 having a predetermined value deltaC. The values d1, d2 and deltaC are decreasing functions of the sum of power A between the points A1 and A2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES8802439A ES2012535A6 (en) | 1988-07-07 | 1988-07-07 | Varifocal ophthalmic lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES8802439A ES2012535A6 (en) | 1988-07-07 | 1988-07-07 | Varifocal ophthalmic lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2012535A6 true ES2012535A6 (en) | 1990-04-01 |
Family
ID=8257607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES8802439A Expired - Lifetime ES2012535A6 (en) | 1988-07-07 | 1988-07-07 | Varifocal ophthalmic lens |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES2012535A6 (en) |
-
1988
- 1988-07-07 ES ES8802439A patent/ES2012535A6/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| SA6 | Expiration date (snapshot 920101) |
Free format text: 2008-07-07 |