Pseudo-accommodative IOL having diffractive zones with varying areas
US7441894B2 · kind B2 · utility
107Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2006 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Feb 9, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/20
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In one aspect of the invention, a trifocal ophthalmic lens is disclosed that includes an optic having at least one optical surface, and a plurality of diffractive zones that are disposed on a portion of that surface about an optical axis of the optic. At least two of those diffractive zones have different areas so as to cause broadening of optical energy profiles at a near and a far foci of the diffractive zones for generating an intermediate focus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.