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Opt Express. 2008 Mar 17;16(6):3877-95.

Geometrical analysis of the loss of ablation efficiency at non-normal incidence.

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1
Grupo de Investigación de Cirugía Refractiva y Calidad de Visión, Instituto de Oftalmobiología Aplicada, University of Valladolid, Valladolid, E-47005, Spain. samuel.arba.mosquera@eye-tech.net

Abstract

A general method to analyze the loss of ablation efficiency at non-normal incidence in a geometrical way is provided. The model is comprehensive and directly considers curvature, system geometry, applied correction, and astigmatism as model parameters, and indirectly laser beam characteristics and ablative spot properties. The model replaces the direct dependency on the fluence by a direct dependence on the nominal spot volume and on considerations about the area illuminated by the beam, reducing the analysis to pure geometry of impact. Compensation of the loss of ablation efficiency at non-normal incidence can be made at relatively low cost and would directly improve the quality of results.

PMID:
18542485
[Indexed for MEDLINE]
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