Methods and apparatus for lenses and glasses
US7234811B1 · kind B1 · utility
5Cited by
1References
13Claims
0Family size
Inventor
Key dates
| Filing date | Feb 9, 2006 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Feb 9, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Methods and apparatus for lenses and glasses are provided in which a lens (10) is formed with a thickness of less than 5 millimeters without grinding, and has two viewing segments (12 and 14). The first viewing segment (12) has a magnification power to correct for effects of presbyopia for near range viewing, and the second viewing segment (14) has a magnification power to correct for effects of presbyopia for intermediate range viewing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.