Toric ophthalmic lens
US10646328B2 · kind B2 · utility
0Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2015 |
| Grant date | May 12, 2020 |
| Priority date | — |
| Expiry date | Jan 16, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A tonic ophthalmic lens is described in which refractivity of the lens differs between a first direction on a plane perpendicular to an optical axis of the lens and a second direction which differs from the first direction on the plane. In addition, refractivity difference which is the difference between the refractivity in the first direction and the refractivity in the second direction varies depending on a position of the lens in a radial direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.