Method of making a one-piece intraocular lens
US5169569A · kind A · utility
12Cited by
2References
5Claims
0Family size
Inventors
Key dates
| Filing date | Aug 5, 1991 |
| Grant date | Dec 8, 1992 |
| Priority date | — |
| Expiry date | Aug 5, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2033/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The PMMA (Polymethyl methacrylate) plastic used to produce one-piece intraocular lenses is modified by a novel thermoplastic pressure forming process to produce a much tougher material with improved mechanical properties. The improved material exhibits greater ductility and fatigue resistance than conventional cast PMMA sheet, resulting in a one-piece lens that is less prone to breakage from implantation or use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.