Ablation apparatus for ablating a cornea by laser beam
US5445633A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 1994 |
| Grant date | Aug 29, 1995 |
| Priority date | — |
| Expiry date | Oct 25, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2009/00872
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An ablation apparatus for ablating the surface of a cornea by laser beam having a laser source for emitting a laser beam, an ablation optical system for ablating the surface of a cornea by the laser beam emitted from the laser source, an diaphragm with a variable diameter for changing an ablation area on the cornea, a cornea shape forming device for forming a desired shape of cornea's optical zone by superposing the irradiation through the ablation optical system, an input device for inputting a data to determine a transition zone as to be connected the optical zone with a non-ablation area smoothly, and a control device for controlling the diameter of the diaphragm by determining the shape of the transition zone based on the data inputted through the input device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.