Aspheric soft lens
US7192444B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2002 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | Nov 30, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2002/1686
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An aspheric soft intraocular lens, having an optical power surface, which may have multiple radii portions or aspherical portions, as well as spherical portions, intended to replace the crystalline lens of a patient's eye, in particular after a cataract extraction. Such an aspheric soft lens is molded in a coined mold. A pair of core pins, positioned within the mold cavity during the lens forming process, will produce a pair of haptic-mounting holes within the lens. As the lenses are subsequently tumbled to remove flash, indentations will form adjacent to the haptic-mounting holes. These indentations allow for tangential attachment of the haptic to the lens which, in turn, enables maximum flexibility without exceeding the width of the optic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.