Device for shaping the cornea
US5895384A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1996 |
| Grant date | Apr 20, 1999 |
| Priority date | — |
| Expiry date | Oct 7, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2009/00872
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device for shaping the cornea of an eye, including a laser (1), the laser beam of which has a circular mode of distribution, and a beam-shaping device and a beam-guiding device, which direct the laser beam onto the cornea. To homogenize the energy density over the cross section of the beam, the beam-shaping device is provided with a focusing optic which focuses the laser beam, a diffraction element which is disposed at a short distance from the focus plane of the focusing optic and the diffraction maxima of which interfere with the minima of the mode of distribution, and an image-field diaphragm which is disposed at a site which is optically conjugate to the cornea.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.