Progressive addition lenses
US6086203A · kind A · utility
126Cited by
14References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1998 |
| Grant date | Jul 11, 2000 |
| Priority date | — |
| Expiry date | Sep 3, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/061
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention provides progressive addition lenses in which lens unwanted astigmatism is reduced and channel width through the intermediate and near vision zones is increased as compared to conventional progressive addition lenses. This result is achieved by combining a progressive addition surface with a first dioptric add power with at least one optical element that provides additional dioptric add power to the lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.