Soft translating contact lens for presbyopia
US6942341B2 · kind B2 · utility
1Cited by
10References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2004 |
| Grant date | Sep 13, 2005 |
| Priority date | — |
| Expiry date | Jun 9, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/048
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of producing a master cast used in making a contact lens mold, comprising the steps of: rotating a master cast blank, having an outer surface, about a first rotational axis and cutting at lest one first surface onto the outer surface of the master cast blank; and rotating the master cast blank about a plurality of secondary rotational axes, each secondary rotational axis being different from the first rotational axis, and cutting a portion of a ridge-off surface from the outer surface of the master cast blank while rotating at each secondary rotational axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.