Title: The amount of corneal ablation and higher order wavefront aberrations of the cornea in LASIK surgery for myopia
Abstract: Objective To investigate the relationship between wavefront aberrations of the cornea and the magnitude of refractive correction in LASIK surgery for myopia.Methods Two hundred forty-six eyes of 160 patients with myopia were included in the retrospective study. Wavefront aberrations of the cornea were assessed preoperatively and 1 to 2 months postoperatively using a corneal topographer (Optikon-2000SpA) and a picture processor (Keratron-Scout ). The groups were divided according to corneal ablation depth and diameter. The data were analyzed by SPSS 12.0.Results The amount of wavefront aberration degradation after surgery decreased with an increase in the ablation zone ( from 5.5 mm to 7.0 mm). In a group with the same ablation zone, a measurement of 6 mm of the cornea showed more aberration degradation than a measurement of 3 mm zone. The amount of wavefront aberration degradation after surgery increased with an increase in ablation depth (from 40 μm to 110 μm). In a group with the same ablation depth,a measurement of 6 mm of the cornea showed more aberration depravation than a measurement of 3 mm.Conclusion Degradation of higher order wavefront aberrations of the cornea after LASIK is influenced by multiple factors, mainly related to the depth and diameter of the corneal ablation.
Publication Year: 2006
Publication Date: 2006-01-01
Language: en
Type: article
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