Clinical Outcomes of an Optimized Prolate Ablation Procedure for Correcting Residual Refractive Errors Following Laser Surgery
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Purpose: The purpose of this study was to investigate the clinical efficacy of an optimized prolate ablation procedurefor correcting residual refractive errors following laser surgery. Methods: We analyzed 24 eyes of 15 patients who underwent an optimized prolate ablation procedure for thecorrection of residual refractive errors following laser in situ keratomileusis, laser-assisted subepithelial keratectomy,or photorefractive keratectomy surgeries. Preoperative ophthalmic examinations were performed,and uncorrected distance visual acuity, corrected distance visual acuity, manifest refraction values (sphere,cylinder, and spherical equivalent), point spread function, modulation transfer function, corneal asphericity(Q value), ocular aberrations, and corneal haze measurements were obtained postoperatively at 1, 3, and 6months. Results: Uncorrected distance visual acuity improved and refractive errors decreased significantly at 1, 3, and 6months postoperatively. Total coma aberration increased at 3 and 6 months postoperatively, while changes inall other aberrations were not statistically significant. Similarly, no significant changes in point spread functionwere detected, but modulation transfer function increased significantly at the postoperative time points measured. Conclusions: The optimized prolate ablation procedure was effective in terms of improving visual acuity andobjective visual performance for the correction of persistent refractive errors following laser surgery.
Abstract
Purpose: The purpose of this study was to investigate the clinical efficacy of an optimized prolate ablation procedurefor correcting residual refractive errors following laser surgery. Methods: We analyzed 24 eyes of 15 patients who underwent an optimized prolate ablation procedure for thecorrection of residual refractive errors following laser in situ keratomileusis, laser-assisted subepithelial keratectomy,or photorefractive keratectomy surgeries. Preoperative ophthalmic examinations were performed,and uncorrected distance visual acuity, corrected distance visual acuity, manifest refraction values (sphere,cylinder, and spherical equivalent), point spread function, modulation transfer function, corneal asphericity(Q value), ocular aberrations, and corneal haze measurements were obtained postoperatively at 1, 3, and 6months. Results: Uncorrected distance visual acuity improved and refractive errors decreased significantly at 1, 3, and 6months postoperatively. Total coma aberration increased at 3 and 6 months postoperatively, while changes inall other aberrations were not statistically significant. Similarly, no significant changes in point spread functionwere detected, but modulation transfer function increased significantly at the postoperative time points measured. Conclusions: The optimized prolate ablation procedure was effective in terms of improving visual acuity andobjective visual performance for the correction of persistent refractive errors following laser surgery.
참고문헌 (28)
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