14 July 2003 Corneal ablation rate at 266 nm
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Proceedings Volume 4951, Ophthalmic Technologies XIII; (2003) https://doi.org/10.1117/12.482465
Event: Biomedical Optics, 2003, San Jose, CA, United States
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.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Per G. Soderberg, Fabrice Manns, Stephen Sulhorn, Nelson Salas, Peggy D. Lamar, and Jean-Marie A. Parel "Corneal ablation rate at 266 nm", Proc. SPIE 4951, Ophthalmic Technologies XIII, (14 July 2003); doi: 10.1117/12.482465; https://doi.org/10.1117/12.482465
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