Ablation profile calibration plate
US6116737A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 13, 2000 |
| Grant date | Sep 12, 2000 |
| Priority date | — |
| Expiry date | Jan 13, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2009/00872
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A profiling and/or calibration sample plate allowing approximately full scale calibration monitoring of an ablation achieved in corneal tissue. The profiling/calibration sample plate also allows for a permanent record of an achieved corneal ablation to be made immediately before (and/or during) the actual cornea to be ablated is ablated. The present invention allows "in vitro" full scale determination of the ablation profile resulting from a given set of refractive laser parameters. One exemplary profiling/calibration sample plate includes a plate (or other shape) having a recess adapted to contain a cross-linked collagen material. The collagen material serves as an approximation of corneal tissue having a similar ablation rate to allow for a "full scale" calibration and/or measurement of an ablation procedure as it will actually occur in a cornea. The profiling/calibration sample plate may include alignment registration elements to allow precise positioning of the calibration plate with respect to an astigmatism or other directional optical component if included in the ablation profile. A non-contact interferometer may be used to measure the resultant or achieved ablation profile …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.