Preferential orientation of contact lenses
US4268133A · kind A · utility
107Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1979 |
| Grant date | May 19, 1981 |
| Priority date | — |
| Expiry date | Oct 11, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/048
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved contact lens and method of forming the same which causes the lens to adopt and maintain a particular angular orientation upon the eye of a wearer. One or more characters are formed in relief upon a surface of the lens at a point which is intended as the topmost point in the lens when properly oriented. The relieved characters may be used alone or in combination with previously-known means for effecting orientation of the lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.