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Proceedings Paper

Corneal ablation rate at 266 nm
Author(s): Per G. Soderberg; Fabrice Manns; Stephen Sulhorn; Nelson Salas; Peggy D. Lamar; Jean-Marie A. Parel
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Paper Abstract

The potential of ns pulses of 266 nm from a frequency shifted Nd:YAG laser for corneal ablation was tested on human eye bank eyes. Scanning electron microscopy demonstrated that consecutive pulses in the same spot induced thermal damage that was related to the pulse energy. The ablation threshold was estiamted to 4.5 J/cm2. The ablation per pulse slightly above threshold was 0.2-0.6 μm. It is concluded that the precision of the ablation is relevant for refractive ablations of the cornea. The higher radiation exposure required for corneal ablation at 266 nm compared to that for shorter wavelengths induces higher energy load on the cornea. To avoid heat build-up, a random flying spot is probably needed.

Paper Details

Date Published: 14 July 2003
PDF: 6 pages
Proc. SPIE 4951, Ophthalmic Technologies XIII, (14 July 2003); doi: 10.1117/12.482465
Show Author Affiliations
Per G. Soderberg, St. Erik's Eye Hospital (Sweden)
Bascom Palmer Eye Institute, Univ. of Miami (Sweden)
Univ. of Miami (Sweden)
Fabrice Manns, Bascom Palmer Eye Institute, Univ. of Miami (United States)
Univ. of Miami (United States)
Stephen Sulhorn, Bascom Palmer Eye Institute, Univ. of Miami (United States)
Univ. of Miami (United States)
Nelson Salas, Bascom Palmer Eye Institute, Univ. of Miami (United States)
Univ. of Miami (United States)
Peggy D. Lamar, Bascom Palmer Eye Institute, Univ. of Miami (United States)
Univ. of Miami (United States)
Jean-Marie A. Parel, Bascom Palmer Eye Institute, Univ. of Miami (United States)
Univ. of Miami (United States)


Published in SPIE Proceedings Vol. 4951:
Ophthalmic Technologies XIII
Fabrice Manns; Per G. Söderberg; Arthur Ho, Editor(s)

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