Surface-treated soft contact lenses
US4379893A · kind A · utility
29Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1981 |
| Grant date | Apr 12, 1983 |
| Priority date | — |
| Expiry date | Aug 26, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2333/14
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A hydrophilic polymer shaped article adapted for use as a soft contact lens is treated to provide at least on the surfaces thereof a modified, less hydrophilic polymeric structure inhibiting penetration by proteins and other substances in the eye environment, whereby development of clouding and discoloration of the lens material during use is significantly retarded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.