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Proceedings Paper

Excimer Laser Application For Cataract Surgery
Author(s): Patricia E Bath; Gerhard Mueller; David J Apple; Norbert Muller Stolzenburg
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Paper Abstract

The ablation threshold of bovine lenses was determined for excimer laser radiatiF at 308 nanreters. The ablation th5eshold for bovine lenses was approximately 0.6J/cm +/-0.1J/cm , for cortex and 1J/cm for nucleus. The threshold for bovine nucleus was higher than the threshold for cortex and difference was statistically significant at the 0.05 level. The relatively low ablation threshold for bovine lenses demonstrates the potential effectiveness of excimer laser radiation at 308 nm for cataract surgery. An experimental prototype has been developed and results of its application demonstrated. Further experiments to demonstrate safety for the retina and adjacent ocular structures are necessary because of the well known hazards of ultraviolet radiation. The potential of theleymir laser for keratorefractive surgery is currently under intensive investigation. In preliminary studies the ablation behavior of bovine lenses was investigated. The objective of this study was to quantify ablation rates as the first step in determining the specification for a laser system which would be practical in the clinical setting. Although excimer laser systems are available at 193 nm (ArF), 248 (KrF) and 351 (xeF) we selected 308 nm because of the availability of fiberoptics for the transmission of 308 nm as well as the known absorbance of human lenses in the 280 nm region.

Paper Details

Date Published: 3 June 1988
PDF: 3 pages
Proc. SPIE 0908, Laser Interaction with Tissue, (3 June 1988); doi: 10.1117/12.945345
Show Author Affiliations
Patricia E Bath, Laser Medizin Zentrum (Germany)
Gerhard Mueller, Laser Medizin Zentrum (Germany)
David J Apple, University of Utah (United States)
Norbert Muller Stolzenburg, Laser Medizin Zentrum (Germany)

Published in SPIE Proceedings Vol. 0908:
Laser Interaction with Tissue
Michael W. Berns, Editor(s)

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