Patient fixation system and method for laser eye surgery
US6406473B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1999 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Oct 1, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2009/00872
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A visual fixation system which enhances the alignment between the eye and a laser beam of a laser eye surgery system, the fixation system often having an adjustable optical train. The optical train of the fixation system allows an eye having a significant refractive error to be accurately focused at a fixation target. To accommodate the refractive error, the adjustable optical train will often project an image of the target so that the projected image is in focus in front of or behind the plane of the patient's eye. The proper projection distance is calculated to accommodate the refractive error of the eye, the calculation preferably based at least in-part on the eye glass prescription for that eye.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.