Correction factor for ablation algorithms used in corneal refractive surgery with gaussian-profile beams | Zendy

Jos� Ram�n Jim�nez | Zendy; Rosario Gonz�lez Anera | Zendy; L. Jim�nez del Barco | Zendy; E. Hita | Zendy; Francisco P�rez-Oc�n | Zendy

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Correction factor for ablation algorithms used in corneal refractive surgery with gaussian-profile beams

Author(s) -

Jos� Ram�n Jim�nez,

Rosario Gonz�lez Anera,

L. Jim�nez del Barco,

E. Hita,

Francisco P�rez-Oc�n

Publication year - 2005

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/opex.13.000336

Subject(s) - keratomileusis , lasik , refractive surgery , optics , gaussian , ablation , gaussian beam , laser beam quality , radius , photorefractive effect , laser , beam (structure) , physics , cornea , computer science , laser beams , medicine , computer security , quantum mechanics

We provide a correction factor to be added in ablation algorithms when a Gaussian beam is used in photorefractive laser surgery. This factor, which quantifies the effect of pulse overlapping, depends on beam radius and spot size. We also deduce the expected post-surgical corneal radius and asphericity when considering this factor. Data on 141 eyes operated on LASIK (laser in situ keratomileusis) with a Gaussian profile show that the discrepancy between experimental and expected data on corneal power is significantly lower when using the correction factor. For an effective improvement of post-surgical visual quality, this factor should be applied in ablation algorithms that do not consider the effects of pulse overlapping with a Gaussian beam.

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