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Proceedings Paper

Keratorefractive procedures
Author(s): Theo Seiler
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Paper Abstract

Two laser types are going to find a place in refractive surgery of the cornea: the excimer laser (193 nm) and mid-infrared YAG lasers, such as Ho:YAG (2.1 micrometers ) and Er:YAG (2.94 micrometers ). Whereas the excimer laser used for photorefractive keratectomy (PRK) and phototherapeutic keratectomy (PTK) is currently studied in clinical trials, Ho:YAG and Er:YAG lasers are still in the state of preclinical evaluation. For myopic corrections excimer laser PRK has shown to be safe and effective in the range up to -7.0 D. The results compare favorably with conventional procedures such as radial keratotomy. Complications are rare. Hyperopic and astigmatic corrections using the Ho:YAG laser (HOT) are effective, but safety and stability has yet to be proven. Er:YAG laser photoablation yields a healing response in animal eyes similar to the excimer laser.

Paper Details

Date Published: 1 November 1991
PDF: 2 pages
Proc. SPIE 1525, Future Trends in Biomedical Applications of Lasers, (1 November 1991); doi: 10.1117/12.48202
Show Author Affiliations
Theo Seiler, Freie Univ. Berlin (Switzerland)


Published in SPIE Proceedings Vol. 1525:
Future Trends in Biomedical Applications of Lasers

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