Increased higher-order optical aberrations after laser refractive surgery - A problem of subclinical decentration
Increased higher-order optical aberrations after laser refractive surgery - A problem of subclinical decentration
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DOI：
10.1016/s0886-3350(00)00806-3
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发表时间：
2001-03-01
影响因子：
2.8
通讯作者：
Seiler, T
中科院分区：
文献类型：
--
作者：
Mrochen, M;Kaemmerer, M;Seiler, T
目的：研究临床和理论影响的亚临床decentrations的光学性能的眼睛后photorefractive laser surgery.Setting：眼科，德累斯顿大学，Dresden，德国.Methods：眼像差测定之前和1个月后，顺利photorefractive角膜切除术（PRK）与Multiscan激光（Schwind）在10只眼的8例患者。矫正范围为-2.5至-6.0屈光度，使用6.0 mm或更大的消融区。测量的波前误差进行了比较，使用单独确定的偏心和目前使用的消融profiles.Results的数值模拟：PRK引起的像差显着大于术前像差。数值计算的高阶像差的增加与临床结果相关，表明彗差和球面像差的主要增加。亚临床偏心（小于1.0 mm）被认为是角膜激光手术后彗差和球面像差增加的主要因素。为了最大限度地减少高阶光学误差，需要特别努力使消融区居中;例如，通过考虑视轴的眼睛跟踪系统。
Purpose: To study the clinical and theoretical effects of subclinical decentrations on the optical performance of the eye after photorefractive laser surgery.Setting: Department of Ophthalmology, University of Dresden, Dresden, Germany.Methods: Ocular aberrations were determined before and 1 month after uneventful photorefractive keratectomy (PRK) with the Multiscan laser (Schwind) in 10 eyes of 8 patients. The corrections ranged from -2.5 to -6.0 diopters, and ablation zones of 6.0 mm and larger were used. The measured wavefront errors were compared to numerical simulations using the individually determined decentrations and currently used ablation profiles.Results: The PRK-induced aberrations were significantly greater than the preoperative aberrations. The numerically calculated increase in the higher-order optical aberrations correlated with the clinical results, demonstrating a major increase in coma-like and spherical-like aberrations Subclinical decentration (less than 1.0 mm) was found to be a major factor in increased coma-like and spherical-like aberrations after corneal laser surgery.Conclusion. To minimize higher-order optical errors, special efforts to center the ablation zone are necessary; for example, by eye-tracking systems that consider the visual axis.