Free form lens design and method for preventing and/or slowing myopia progression
US9733494B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2014 |
| Grant date | Aug 15, 2017 |
| Priority date | — |
| Expiry date | Sep 20, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/24
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Lenses incorporate freeform power profiles that at least one of slow, retard or preventing myopia progression. An ophthalmic lens includes a first zone at a center of the lens; a first peripheral region continuously extending from the center, the first peripheral region having a different dioptric power than at the center; and a second peripheral region continuously extending from the first peripheral region and having a different dioptric power than the first peripheral region, thereby providing a continuous freeform power profile having substantially equivalent visual performance to a single vision lens, and having a depth of focus and reduced retinal image quality sensitivity that slows, retards, or prevents myopia progression.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.