Method for manufacturing aphakic intraocular lens
US8500805B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2009 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Aug 25, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2240/001
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method of manufacturing an aphakic intraocular lens that is capable of ensuring every multi-focusing effect more securely, while reducing the impact of aperture changes and lens eccentricity. At least two reliefs whose first order diffracted lights give respective focal distances different from one another are set to overlap with each other in at least a part of an area in a radial direction of the lens, and with respect to every grating pitches of one relief having a maximum grating pitch among the reliefs set up in overlap, grating pitches of another relief are overlapped periodically in order to obtain a relief pattern, so that the resulting relief pattern is formed on a lens surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.