Disposable contact lens for use with an ophthalmic laser system
US6373571B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1999 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Mar 11, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/3937
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device for use in laser ophthalmic surgery includes a laser system, a disposable contact lens and an adjustable retainer ring for mounting the contact lens on the laser system. In order to properly align the disposable contact lens to the laser system, reference marks on the contact lens are brought into coincidence with predetermined focal points along the laser beam paths. To this end, the laser system successively directs a laser beam along at least three predetermined paths to respective predetermined focal points, and the contact lens is positioned across these predetermined paths. Along each predetermined path, the laser beam is activated to establish a series of laser marks on the contact lens. If the laser marks, predetermined focal points and reference marks are all coincident, then the contact lens is properly aligned with the laser system. If there is any displacement between any laser mark and reference mark, however, the retainer ring is adjusted to align all reference marks with all predetermined focal points to align the lens to the laser system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.