Accelerated corneal crosslinking concurrent with laser in situ keratomileusis

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Abstract
To assess accelerated corneal collagen crosslinking (CXL) applied concurrently with laser in situ keratomileusis (LASIK) in a small group of patients. Beyoglu Eye Research and Training Hospital, Istanbul, Turkey. Prospective pilot interventional case series. In May 2010, patients had LASIK with concurrent accelerated CXL in 1 eye and LASIK only in the fellow eye to treat myopia or myopic astigmatism. The follow-up was 12 months. The attempted correction (spherical equivalent) ranged from -5.00 to -8.50 diopters (D) in the LASIK-CXL group and from -3.00 to -7.25 D in the LASIK-only group. Main outcome measures were manifest refraction, uncorrected (UDVA) and corrected (CDVA) distance visual acuities, and the endothelial cell count. Eight eyes of 3 women and 1 man (age 22 to 39 years old) were enrolled. At the 12-month follow-up, the LASIK-CXL group had a UDVA and manifest refraction equal to or better than those in the LASIK-only group. No eye lost 1 or more lines of CDVA at the final visit. The endothelial cell loss in the LASIK-CXL eye was not greater than in the fellow eye. No side effects were associated with either procedure. Laser in situ keratomileusis with accelerated CXL appears to be a promising modality for future applications to prevent corneal ectasia after LASIK treatment. The results in this pilot series suggest that evaluation of a larger study cohort is warranted. Drs. Yilmaz and Marshall are paid consultants to Avedro, Inc. No other author has a financial or proprietary interest in any material or method mentioned.

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