Junctionless ophthalmic lenses and methods for making same
US6595639B1 · kind B1 · utility
58Cited by
19References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2000 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Nov 10, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Methods for producing a junctionless ophthalmic lens are provided. Additionally, ophthalmic lenses having junctionless, three dimensional surfaces, for example, asymmetrical anterior and/or posterior surfaces, as well as molding tools used in the production of such lenses, are also provided. The method generally include providing sample data points to define a surface contour, and interpolating between these data points using an algorithm to produce a simulated three dimensional surface. The simulated three dimensional surface is used in producing an ophthalmic lens, for example, in cast molding a contact lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.