Glass coated polysiloxane contact lens
US4217038A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1978 |
| Grant date | Aug 12, 1980 |
| Priority date | — |
| Expiry date | Jun 5, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D11/0073
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A glass coated, flexible, hydrophilic polymeric contact lens having a sufficient amount of oxygen transportability to meet the requirements of the human cornea is disclosed. In addition, this glass coated contact lens is wettable, fillerless, hydrolytically stable, biologically inert, transparent, resilient and soft. The glass coating is substantially colorless, transparent and from about 100 to about 8,000 angstroms thick. The glass may be a silicate glass, a phosphate glass or a germanate glass or mixtures thereof. The contact lens substrate comprises a polymer comprising a poly(organosiloxane) terminally bonded through a divalent hydrocarbon group to a polymerized activated unsaturated group. Further a method of making the glass coated siloxane contact lens is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.