Contact lens
US10698233B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2016 |
| Grant date | Jun 30, 2020 |
| Priority date | — |
| Expiry date | Dec 13, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/041
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A contact lens includes, in order from a center to a periphery, an optical zone and at least two structural zones. The optical zone includes a front surface and a back surface, wherein at least one of the front surface and the back surface is aspheric, and the optical zone provides a positive force or a negative force. The structural zones concentrically surround the optical zone, wherein one of the structural zones provides a positive force, and the other of the structural zones provides a negative force. A composition for manufacturing the contact lens includes at least two kinds of monomers, at least one kind of crosslinking agent, at least one kind of diluent and at least one kind of initiator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.