Visual aid especially for weak-sighted persons
US4714329A · kind A · utility
3Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 7, 1985 |
| Grant date | Dec 22, 1987 |
| Priority date | — |
| Expiry date | Oct 7, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/088
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Visual aid especially for weak-sighted persons and comprising a sleeve into which at least one lens is fittable having the desired optical properties. The sleeve is intended to be fitted into an opening in a spectacle glass and be fixed in an optional position for individual adjustment of the distance between the person's cornea and the lens surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.