Lens element
US11073704B2 · kind B2 · utility
1Cited by
2References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2021 |
| Grant date | Jul 27, 2021 |
| Priority date | — |
| Expiry date | Mar 15, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/24
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens element worn in front of an eye of a person includes a refraction area having a first refractive power based on a prescription for correcting an abnormal refraction of the eye of the person and a second refractive power different from the first refractive power and a plurality of at least three optical elements, at least one optical element having an optical function of not focusing an image on the retina of the eye so as to slow down the progression of the abnormal refraction of the eye.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.