Contact lenses of hydrophilic polymers made by photopolymerization
US4073577A · kind A · utility
24Cited by
5References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1976 |
| Grant date | Feb 14, 1978 |
| Priority date | — |
| Expiry date | Oct 22, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/043
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A contact lens is made from a polymer hydrogel by photopolymerizing a hydroxyalkyl acrylate or methacrylate in the absence of a cross-linking agent. The polymer hydrogel can also be formed by photopolymerization carried out in the presence of a catalyst responsive to short-wave light. Heat can also be used in combination with the photopolymerization to assist in formation of the polymer hydrogel contact lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.