Non-corrective lenses with improved peripheral vision
US7419261B2 · kind B2 · utility
6Cited by
21References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2005 |
| Grant date | Sep 2, 2008 |
| Priority date | — |
| Expiry date | May 10, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for modifying the shape of a spheric or toric non-corrective lens blank such that astigmatic and peripheral defects are reduced. The outer convex and inner concave sides of the lens are initially designed according to the Gullstrand Formula. Thereafter, a visual axis of the lens is defined relative to a reference axis of the lens blank. In the preferred toric lens, the visual axis of the lens is offset from the reference axis. Once the visual axis is defined, the inner concave surface of the lens is modified so as to improve optical quality in a visual center surrounding the visual axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.