Contact lens with palpebral bosses
US5912719A · kind A · utility
41Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1998 |
| Grant date | Jun 15, 1999 |
| Priority date | — |
| Expiry date | Mar 9, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A contact lens has at least one palpebral boss projecting locally from its external surface in its peripheral area. The palpebral boss is globally elongate in a circumferential direction and the slope P of its crest line at both circumferential ends is in the range 0.020 to 0.140 and preferably in the range 0.040 to 0.080. Applications include contact lenses for centered optical correction and contact lenses for presbyopia.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.