Customized eye modeling for optical quality assessment in myopic femto-LASIK surgery

Refractive surgery is recognized as an effective method for myopia treatment, but it can induce night-vision disturbances such as glare. We present an eye modeling method for the optical quality assessment in response to the structural change of eyes by femto-LASIK surgery. Customized eye models were built from the measurements of 134 right eyes preand post-operatively. Optical performance was evaluated using spot diagrams, point spread functions (PSFs), modulation transfer functions (MTFs) and chromatic aberrations at various fields (0–30°), different pupil diameters (2–6 mm) and initial myopias (−1.25 to −10.5 D). Pupil size and initial myopia are the two major factors that affect visual performance of post-operative eyes. The results of spot diagrams, PSFs, and MTFs indicated that post-operative visual performance deteriorated as visual field and pupil size increased and it was significantly influenced by initial myopia. Post-operative chromatic aberrations were also affected by initial myopia, but tended to decrease as pupil size increased. The use of eye modeling for refractive surgery assessment could possibly provide a more personalized surgical approach, could improve the prediction accuracy of refractive surgery outcomes and aid the invention and development of better surgical methods.

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