Progressive addition lenses with varying power profiles
US6199984A · kind A · utility
93Cited by
11References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1999 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | Mar 17, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/065
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention provides lenses, as well as methods for their design and production, in which the power distribution between the distance and near vision zone substantially meets the requirements of the wearer's eye path and refractive power. This power distribution is obtained without introducing additional unwanted astigmatism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.