Production of an ophthalmic eyeglass intended for a wearer
US8142017B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2008 |
| Grant date | Mar 27, 2012 |
| Priority date | — |
| Expiry date | Dec 27, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/061
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for producing an ophthalmic glass (1) intended for an identified wearer of spectacles comprises distribution of an optical power addition between an anterior face (SANT) and a posterior face (SPOST) of said glass. Said distribution of the addition is done in such a way as to modify an optical characteristic as a function of relative amplitudes of eye and head movements of the wearer. Superior comfort of the glass in use is thus obtained. The optical characteristic which is considered may be, in particular, a variation of magnification procured by the glass between far and near vision conditions. An improvement of the invention is to also modify a design of the progressive glass as a function of the amplitudes of the eye and head movements of the wearer, using only a single semifinished glass model of fixed design for each addition value of the anterior face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.