Shaped ophthalmic lenses
US6789896B2 · kind B2 · utility
13Cited by
26References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2002 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Aug 19, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/065
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical lens element includinga first surface; anda second surface of complementary curvature;at least one surface exhibiting significant deviation in curvature from a standard optical surface;the first and second surfaces in combination defining an optical zone exhibiting substantially constant mean through power along at least one meridian.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.