Distance dominant intraocular lens
US11344404B2 · kind B2 · utility
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1References
14Claims
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Key dates
| Filing date | Dec 26, 2018 |
| Grant date | May 31, 2022 |
| Priority date | — |
| Expiry date | Dec 26, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/20
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An intraocular lens includes a base refractive structure having anterior and posterior surfaces that are shaped for producing a first optical power and a diffractive structure formed in one of the surfaces of the base refractive structure including overlapping first and second diffractive patterns over a common aperture for producing second and third optical powers. The second optical power is an uneven division of the third optical power. The first and second diffractive patterns have respective step heights that are separately varied as a function of radial distance from the optical axis over the common aperture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.