Series of progressive ophthalmic lenses
US8333471B2 · kind B2 · utility
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3References
11Claims
0Family size
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Key dates
| Filing date | Mar 2, 2009 |
| Grant date | Dec 18, 2012 |
| Priority date | — |
| Expiry date | Jun 12, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/08
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A series of progressive ophthalmic lenses is proposed, which is indexed by optical power addition values of eyeglasses of spectacles to be made from these lenses. Each lens of the series determines a further gap between a value of the optical power for the near vision direction and a maximum value of the optical power which is obtained for a direction of gaze pointing below said near vision direction. The lenses of the series are adapted for postures of wearers that may vary as a function of the optical power addition values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.