Method for forming a peripheral edge on contact lenses
US4563565A · kind A · utility
86Cited by
12References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1983 |
| Grant date | Jan 7, 1986 |
| Priority date | — |
| Expiry date | Mar 2, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of forming edges on contact lenses prepared from laser-machinable, organic polymers wherein the edge is formed by contacting the lens with a laser beam having a wavelength which is absorbed by the polymer. The radiated energy supplied to the polymer by the laser beam is such that the ratio of heat absorbed in vaporization of the polymer to heat absorbed by the polymer bulk is maximized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.