Refractive surgical laser apparatus and method
US6716210B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 2001 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | Oct 15, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2009/00882
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A scanning ablation laser is disclosed having a fundamental output from a mirrored facet in the ultraviolet range, the fundamental ultraviolet output having an energy level of no greater than 10 mJ/pulse on the corneal surface. A controller controls the laser and scanning mechanism to deliver a focused and scanned pulsed output laser beam in a predetermined overlapping pattern onto a plurality of positions on a corneal surface to photoablate at least one layer of corneal tissue such that an overlap among respective ablating spots of individual pulses of the scanned pulsed output laser beam on a single ablation layer is at least 50%. The scanning mechanism may locate laser beam pulses in a random pattern on the corneal surface. In one embodiment, a beam splitter splits the pulsed output laser beam into a plurality of laser beams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.