Corneal ablation rate at 266 nm

Per G. Soderberg; Fabrice Manns; Stephen Sulhorn; Nelson Salas Jr.; Peggy D. Lamar; Jean-Marie A. Parel

doi:10.1117/12.482465

14 July 2003 Corneal ablation rate at 266 nm

Per G. Soderberg, Fabrice Manns, Stephen Sulhorn, Nelson Salas Jr., Peggy D. Lamar, Jean-Marie A. Parel

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.

Citation Download Citation

Per G. Soderberg, Fabrice Manns, Stephen Sulhorn, Nelson Salas Jr., Peggy D. Lamar, and Jean-Marie A. Parel "Corneal ablation rate at 266 nm", Proc. SPIE 4951, Ophthalmic Technologies XIII, (14 July 2003); https://doi.org/10.1117/12.482465

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