Astigmatic laser ablation of surfaces
US5461212A · kind A · utility
105Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1993 |
| Grant date | Oct 24, 1995 |
| Priority date | — |
| Expiry date | Jun 4, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2009/00872
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Laser surface ablation methods and apparatus are disclosed reprofiling surfaces astigmatically. An optical system includes cylindrically-powered elements to form an elliptical laser irradiation pattern on a target surface. By successively altering the area of the elliptical irradiation, an astigmatic, bi-powered ablation profile is achieved. Preferably, the invention is used with an excimer laser for excimer laser keratoplasty, keratomileusis or other ablative eye surgeries.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.