Manufacturing of progressive spectacle lens customized based on blur perception
US8540366B2 · kind B2 · utility
0Cited by
4References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2010 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Oct 9, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/027
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to the making of a progressive spectacle lens for customizing the lens based on the blur perception by a future lens wearer. Accordingly, a blur threshold value is determined for the wearer according to a blur perception criterion that varies based on an optical-power addition value prescribed for the wearer. The blur threshold value is associated with a reference sight direction for the lens provided to the wearer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.