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Comparison of real and computer-simulated outcomes of LASIK refractive surgery

AuthorsCano, Daniel; Barbero, Sergio ; Marcos, Susana
KeywordsLaser in situ keratomileusis (LASIK)
Refractive Surgery
Computational models
[OCIS] Atmospheric and oceanic optics: Wave-front sensing
[OCIS] Medical optics and biotechnology: Ophthalmology
[OCIS] Vision, color, and visual optics: Vision system - noninvasive assessment
[OCIS] Vision, color, and visual optics: Physiological optics
Issue DateJun-2004
PublisherOptical Society of America
CitationJournal of the Optical Society of America A 21(6): 926-936 (2004)
AbstractComputer simulations of alternative LASIK ablation patterns were performed for corneal elevation maps of 13 real myopic corneas (range of myopia, -2.0 to -11.5 D). The computationally simulated ablation patterns were designed with biconic surfaces (standard Munnerlyn pattern, parabolic pattern, and biconic pattern) or with aberrometry measurements (customized pattern). Simulated results were compared with real postoperative outcomes. Standard LASIK refractive surgery for myopia increased corneal asphericity and spherical aberration. Computations with the theoretical Munnerlyn ablation pattern did not increase the corneal asphericity and spherical aberration. The theoretical parabolic pattern induced a slight increase of asphericity and spherical aberration, explaining only 40% of the clinically found increase. The theoretical biconic pattern controlled corneal spherical aberration. Computations showed that the theoretical customized pattern can correct high-order asymmetric aberrations. Simulations of changes in efficiency due to reflection and nonnormal incidence of the laser light showed a further increase in corneal asphericity. Consideration of these effects with a parabolic pattern accounts for 70% of the clinical increase in asphericity.
Description11 pages, 10 figures.-- OCIS codes: 330.4300, 330.5370, 170.4470, 010.7350.-- PMID: 15191172 [PubMed].
Publisher version (URL)http://dx.doi.org/10.1364/JOSAA.21.000926
Appears in Collections:(CFMAC-IO) Artículos
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