Method for making multifocal ophthalmic lens
US4576623A · kind A · utility
12Cited by
7References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 23, 1984 |
| Grant date | Mar 18, 1986 |
| Priority date | — |
| Expiry date | Mar 23, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laminated multifocal prescription ophthalmic lens is provided comprising a plano (zero power) cap element incorporating a convergent near-vision multifocal segment, the cap being cemented to a prescription-ground single vision base element. The back surface curvature of the base is configured to provide prescribed sphere, cylinder and other vision-corrective refraction characteristics to the laminated lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.