Single vision lenses
US7090349B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2005 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Apr 12, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/02
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Optical lens element with a prescription zone, suitable for use in wraparound or protective type eyewear. The element may also include a peripheral vision zone, with no prismatic jump between the zones. Design methods for the prescription zone include temporally rotating a prescription section about a vertical axis through the optical center thereof, and/or decentring the optical axis of said prescription section relative to the geometric axis thereof, and providing partial surface correction for astigmatic and/or mean power errors. For prescription powers in the range −6.0 to +6.0 diopters with 0 to 3 cyl, the optical lens element may be designed such that its front surface can be mounted in a frame of constant curvature of at least 5.0 diopters, with its back surface providing good clearance from temples and eyelashes. Applications include ophthalmic sunglass lenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.