Customized progressive addition lenses
US6390623B1 · kind B1 · utility
87Cited by
10References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2000 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Mar 29, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/061
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention provides progressive addition lenses designed for uses in which a large region of intermediate refractive power is desirable. The enlarged intermediate region is provided without partial or complete elimination of the distance vision zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.