Fixation ring for radial keratotomy
US4844060A · kind A · utility
Inventor
Key dates
| Filing date | Dec 11, 1987 |
| Grant date | Jul 4, 1989 |
| Priority date | — |
| Expiry date | Dec 11, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F9/013
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Instead of having the surgeon make cuts freehand in a radial keratotomy operation for correction of the refraction of the human cornea, there is provided a fixation ring which has an eccentrically located band or bridge, the side of which is toward the middle of the ring is formed as a vertical, planar positioning and guide surface, extending vertically with respect to the plane of the ring. This bridge can be mounted on the ring itself or fastened onto an inner ring that is freely rotatable with respect to an outer ring. Means for limiting the depth of the cut may also be provided. This makes it easier to obtain straight and regular cuts in the desired radial direction. Operations can be completed more quickly, and there is a better prognosis for obtaining the desired results in the operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.