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Clinical Outcomes of an Optimized Prolate Ablation Procedure for Correcting Residual Refractive Errors Following Laser Surgery

 Byunghoon Chung  ;  Hun Lee  ;  Bong Joon Choi  ;  Kyung Ryul Seo  ;  Eung Kwon Kim  ;  Dae Yune Kim  ;  Tae-im Kim 
 Korean Journal of Ophthalmology, Vol.31(1) : 16-24, 2017 
Journal Title
 Korean Journal of Ophthalmology 
Issue Date
Adult ; Cornea/pathology ; Cornea/surgery* ; Corneal Topography ; Female ; Follow-Up Studies ; Humans ; Keratectomy, Subepithelial, Laser-Assisted/methods* ; Keratomileusis, Laser In Situ/adverse effects* ; Male ; Middle Aged ; Myopia/diagnosis ; Myopia/physiopathology ; Myopia/surgery* ; Refraction, Ocular* ; Reoperation ; Retrospective Studies ; Time Factors ; Visual Acuity
Optimized prolate ablation ; Refractive surgery ; Residual refractive errors
PURPOSE: The purpose of this study was to investigate the clinical efficacy of an optimized prolate ablation procedure for correcting residual refractive errors following laser surgery. METHODS: We analyzed 24 eyes of 15 patients who underwent an optimized prolate ablation procedure for the correction 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 6 months. RESULTS: Uncorrected distance visual acuity improved and refractive errors decreased significantly at 1, 3, and 6 months postoperatively. Total coma aberration increased at 3 and 6 months postoperatively, while changes in all other aberrations were not statistically significant. Similarly, no significant changes in point spread function were 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 and objective visual performance for the correction of persistent refractive errors following laser surgery.
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1. College of Medicine (의과대학) > Dept. of Ophthalmology (안과학교실) > 1. Journal Papers
Yonsei Authors
김응권(Kim, Eung Kweon) ORCID logo https://orcid.org/0000-0002-1453-8042
김태임(Kim, Tae Im) ORCID logo https://orcid.org/0000-0001-6414-3842
서경률(Seo, Kyuong Yul) ORCID logo https://orcid.org/0000-0002-9855-1980
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