Visual indicator on soft contact lenses
US4616910A · kind A · utility
29Cited by
2References
17Claims
0Family size
Inventor
Key dates
| Filing date | Feb 24, 1984 |
| Grant date | Oct 14, 1986 |
| Priority date | — |
| Expiry date | Feb 24, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A soft contact lens is provided with a visual indicator to show that it is not inside out prior to application to the eye. The indicator is such that when viewed from the outside surface of the soft contact lens, it has a distinctly different appearance than when viewed from the inner surface of the lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.