Shaped ophthalmic lenses
US6454408B1 · kind B1 · utility
53Cited by
25References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1999 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Dec 3, 2019 |
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.