Long-Term Clinical Outcomes of Myopic Patients Having Thin Residual Corneal Thickness after Excimer Laser Surface Ablation


Kocamış S. İ. , Çakmak H. B. , Gerçeker S., ÇAĞIL N.

Seminars in Ophthalmology, vol.32, no.4, pp.474-481, 2017 (Peer-Reviewed Journal) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 32 Issue: 4
  • Publication Date: 2017
  • Doi Number: 10.3109/08820538.2015.1120755
  • Journal Name: Seminars in Ophthalmology
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.474-481
  • Keywords: Ectasia, laser epithelial keratomileusis, mitomycin-C, photorefractive keratectomy, residual thin cornea, IN-SITU KERATOMILEUSIS, 10-YEAR FOLLOW-UP, PHOTOREFRACTIVE KERATECTOMY, REFRACTIVE SURGERY, MITOMYCIN-C, EPITHELIAL KERATOMILEUSIS, MODERATE MYOPIA, THAN-6 DIOPTERS, ECTASIA, LASIK

Abstract

© Taylor & Francis.Purpose: To investigate and compare the long-term safety, efficacy, and accuracy of PRK (photorefractive keratectomy) and LASEK (laser epithelial keratomileusis) in myopic corneas having residual corneal thickness less than 400 micron meters (µm). Methods: The medical reports of the patients who had undergone excimer laser surface ablation between 2007–2011 and had a residual corneal thickness less than 400 µm were retrospectively reviewed. Results: Forty-two eyes of 42 patients with a mean age of 28.79±7.76 years were enrolled into the study. Twenty-two PRK and 20 LASEK procedures were performed. The mean follow-up time was 45.00±11.80 months. At the end of follow-up, no ectasia was detected. Nineteen percent of eyes had trace haze. No eyes lost any lines in corrected distance visual acuity. Eighty-one percent of the patients had an uncorrected distance visual acuity better than 20/40. The regression rate was 16.7%. Sixty-two percent of eyes were within ±1.00 D. The safety and efficacy indexes were 1.19±0.42 and 1.00±0.40, respectively. There was not any difference between LASEK and PRK regarding achieved spherical equivalent refraction, haze ratio, visual acuity, safety, efficacy, and regression. Conclusions: Both PRK and LASEK are safe and effective in myopic corneas having thin residual thickness.