Method for selecting base-curves for an ophthalmic lens and related spectacle lens manufacturing method
US8313194B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2008 |
| Grant date | Nov 20, 2012 |
| Priority date | — |
| Expiry date | Dec 23, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/08
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for selecting base-curves for an ophthalmic lens according to given prescription data comprising the steps of: providing a base-curve series consisting of a plurality of base-curves; calculating a target lens according to the prescription data; calculating the base-curves calculated lenses according to the prescription data; selecting, for at least an optical parameter and/or a geometrical parameter, a threshold value for the difference between the base-curves calculated lenses values and the target lens value of said parameter(s); determining the list of the base-curves of the base-curve series where said difference for said parameter(s) is less or equal to the selected threshold value(s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.