Optical system using an ophthalmic lens and an intra-ocular lens to improve the sight of a person suffering from macular degeneration
US4957506A · kind A · utility
38Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 30, 1989 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Aug 30, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/02
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An optical system for improving the sight of a person suffering from macular degeneration comprises a high positive power ophthalmic lens adapted to be disposed in front of the eye to be treated and a high negative power intra-ocular lens adapted to be implanted in the eye to be treated after removal of its crystalline lens. At least one surface of each lens is an aspherical surface of revolution. This aspherical surface of revolution preferably has a generatrix that is a conic section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.