Clinical Effects of Pure Cyclotorsional Errors during Refractive Surgery

摘要: PURPOSE. To describe the theoretical effects of cyclotorted ablations on induced aberrations and determine limits tolerance cyclotorsional accuracy. METHODS. A method was developed to average cyclotorsion during refractive surgery without a tracker. Mathematical conditions were simulated optical, visual, absolute benefits in 76 consecutive treatments performed right eyes. The results evaluated as Zernike expansion residual wavefront aberrations. RESULTS. Ablations based purely decomposition but with applied resulted same modes different magnitudes orientations, indicating that effect compensation can be analyzed by single magnitude orientation. depends angular frequency, not radial order. mean 4.39° obtained. optical benefit achieved 95% treatments, visual 95%, an 93% compared 89%, 87%, 96% achieving actual benefits, respectively. CONCLUSIONS. Residual resulting from depend included ablation error. impact is smaller than decentered or edge coma spherical are valid within single-failure condition pure errors, because no other sources considered. leap mathematical model real-world outcome cannot extrapolated further study. (Invest Ophthalmol Vis Sci. 2008;49:4828‐4836) DOI:10.1167/iovs.08-1766