Method for determination of an ophthalmic lens using an astigmatism prescription for far sight and for near sight
US7249850B2 · kind B2 · utility
28Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2004 |
| Grant date | Jul 31, 2007 |
| Priority date | — |
| Expiry date | Jul 27, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/065
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method is disclosed for determination of an ophthalmic lens for a wearer for whom a near-vision and far-vision astigmatism prescription has been made out, the near-vision astigmatism being different from the far-vision astigmatism. The method includes the steps of: choosing a starting lens and defining a current lens equal to the starting lens; optimization, in worn conditions, of the current lens using as a target the astigmatism for which the wearer has been giving a prescription for far vision and the astigmatism for which the wearer has been given a prescription for near vision.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.