Multi focal intra-ocular lens
US5192317A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 1992 |
| Grant date | Mar 9, 1993 |
| Priority date | — |
| Expiry date | Apr 8, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2/1618
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention comprises an IOL with at least a center zone and two concentrically located ring zones arranged thereabout, the center zone having a distance power correction. The first concentric ring zone has a near power correction and the second concentric zone a distance power correction. In one embodiment the lens body is provided with haptics which act to center the lens body when it is surgically implanted within the posterior lens capsule. In other embodiments, the lens diameter is increased to mate with the internal dimensions of the posterior lens capsule or is provided with an encircling haptic which bears against the posterior lens capsule.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.