Multifocal ophthalmic lens
US5949519A · kind A · utility
17Cited by
3References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1998 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Jul 17, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/08
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multifocal ophthalmic lens comprising a far vision region, a near vision region and an intermediate vision region is provided having a high near vision region and a wide vision field in the near vision region, the intermediate vision region and in the far vision region. Progression is gentle although the distance between a mounting center on the lens and the point where power addition is 85% higher than power addition at a far vision control point is less than 16 mm, while simultaneously maximum cylinder inside a 20 mm radius circle centered on a geometrical center of the lens is kept at a low value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.