Spectacle lens insert for aphakic refraction
US4269487A · kind A · utility
2Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 11, 1980 |
| Grant date | May 26, 1981 |
| Priority date | — |
| Expiry date | Apr 11, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C9/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Over refraction of an aphakic patient with a temporary lens clipped into an empty eye wire of a spectacles frame to be subsequently permanently glazed and worn by the patient. With the temporary lens set at proper vertex distance from the cornea, centered with the eye and correct face fitting adjustment of the frame, over-refraction is undertaken for determination of permanent lens refractive requirements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.