Method for characterizing an ophthalmic lens
US9863842B2 · kind B2 · utility
1Cited by
0References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 24, 2016 |
| Grant date | Jan 9, 2018 |
| Priority date | — |
| Expiry date | Aug 24, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Contact lenses often comprise a coating containing water so as to enhance comfort when being worn on the eye. The present invention is useful to determine the water content of the coating of a contact lens. To determine the water content of the coating, the lens having the coating to be measured is arranged under water. The reflectivity of the surface of the lens is then determined with the aid of a Chromatic sensor system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.