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Invest Ophthalmol Vis Sci. 2012 Oct 11;53(11):7116-21. doi: 10.1167/iovs.12-9826.

Comparison of LASIK and surface ablation by using propensity score analysis: a multicenter study in Korea.

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  • 1Catholic Institute for Visual Science, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.

Abstract

PURPOSE:

We compared the 3-year outcomes with regard to efficacy, stability, and safety of LASIK and surface ablation performed at multiple centers in Korea.

METHODS:

The charts of 5109 eyes that underwent LASIK or surface ablation, including LASEK, epi-LASIK, and photorefractive keratectomy (PRK), at multiple centers between 2002 and 2005 were reviewed. Of these, 577 LASIK-treated eyes and 577 propensity score-matched surface-ablated eyes were included in this cohort study. A standardized case report form (CRF) was completed based on a review of the 3-year follow-up chart. The CRF included the preoperative, surgical, and postoperative data for the refractive error, uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA), IOP, corneal thickness, keratometry, corneal topography, Schirmer test, and tear breakup time (TBUT).

RESULTS:

The efficacy index calculated after 3 years and the postoperative spherical equivalents measured at 3 months or 3 years did not differ between the LASIK and surface ablation groups. Although myopic regression was observed in the surface ablation group through postoperative years 1 and 2, this difference did not affect the visual acuity significantly. Surface ablation did carry a higher cumulative incidence of corneal haze.

CONCLUSIONS:

LASIK and surface ablation produced similar postoperative visual efficacy after corneal healing. The outcome predictability did not differ between the 2 groups, but myopic regression was observed more frequently in the surface ablation group. Corneal haze after surface ablation is much more common than reported previously.

PMID:
22991419
[PubMed - indexed for MEDLINE]
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