Trifocal intraocular lens with extended range of vision and correction of longitudinal chromatic aberration
US11129707B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2017 |
| Grant date | Sep 28, 2021 |
| Priority date | — |
| Expiry date | Jun 17, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/20
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Disclosed is an intraocular lens (IOL) including an anterior surface, a posterior surface and an optical axis. At least one of the anterior or posterior surfaces has a diffractive profile formed thereon. The diffractive profile has diffractive focal points for far vision, intermediate vision, and near vision. The diffractive profile corresponds to a superposition of a first partial diffractive profile and a second partial diffractive profile, the first partial diffractive profile has a focal point of order +n that coincides with the diffractive focal point for intermediate vision or with the diffractive focal point for near vision, the second partial diffractive profile has a focal point of order +n that coincides with the diffractive focal point for far vision and a focal point of higher order than +n that coincides with the diffractive focal point for near vision.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.