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Corneal crosslinking for keratoconus in Iranian patients: Outcomes at 1 year following treatment

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Author(s): Saffarian Ladan | Khakshoor Hamid | Zarei-Ghanavati Mehran | Esmaily Habibollah

Journal: Middle East African Journal of Ophthalmology
ISSN 0974-9233

Volume: 17;
Issue: 4;
Start page: 365;
Date: 2010;
Original page

Keywords: Cornea | Crosslinking | Progressive Keratoconus | Riboflavin | Ultraviolet A

ABSTRACT
Aim and Design: A retrospective, nonrandomized, single-center clinical study was designed to evaluate the outcomes of corneal collagen crosslinking (CXL) for progressive keratoconus in Iranian patients 12 months after CXL. Settings: This study was carried out at Navid Didegan Eye Center, a private clinic, Mashhad, Iran. Materials and Methods: Ninety-two eyes of 53 subjects with progressive keratoconus were evaluated in this study. All eyes completed 1-year follow-up. The outcome measures were uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA), sphere and cylinder refraction, keratometry, and corneal thickness. Comparison of baseline and 1-year postoperative data is reported in this study. The Wilcoxon signed-ranked and Student′s t-tests were used for statistical analyses. P < 0.05 was statistically significant. Results: The mean age was 21.5 ± 3.4 years (range, 16 -30 years). Thirty-one (58.5%) of the subjects were men and 22 (41.5%) were women. Mean baseline UCVA and BSCVA were 0.61 ± 0.31 and 0.06 ± 0.12 logarithm of minimal angle of resolution (logMAR), respectively. One year postoperatively UCVA was 0.31 ± 0.25 logMAR and BSCVA was 0.0 ± 0.01 logMAR. UCVA and BSCVA were statistically higher postoperatively (P < 0.001, both parameters). The mean astigmatism decreased by 0.78 ± 1.49 diopter (D) with significant variation during the follow-up period (P < 0.001). Mean baseline simulated keratometry (SIM K) was 46.94 ± 2.37 D and decreased to 46.0 ± 2.33 D on year postoperatively (P < 0.001). Conclusion: Corneal CXL seems to be efficient in stabilization of progressive keratoconus progression in Iranian patients at 1 year of followup.

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