Ophthalmic optic devices
US6000798A · kind A · utility
32Cited by
14References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1997 |
| Grant date | Dec 14, 1999 |
| Priority date | — |
| Expiry date | Oct 6, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/061
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A novel ophthalmic lens is provided. The lens includes an astigmatism subtracting surface that removes unwanted astigmatism caused by other elements of the lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.