Posters

Three-year observation of laser in situ keratomileusis cases for myopia: a multicentre cohort study

Poster Details

First Author: J.Kim SOUTH KOREA

Co Author(s):    C. Joo   J. Hyon   T. Kim   J. Kim   J. Kim   H. Tchah     

Abstract Details

Purpose:

We attempted to show the efficacy, safety, and predictability of myopic LASIK in Koreans.

Setting:

Six ophthalmology centers, namely the Catholic University of Korea, the Yonsei University College of Medicine, the University of Ulsan College of Medicine (Asan Medical Center), the Seoul National University College of Medicine, the Inje University College of Medicine, and the Gangnam BS Eye Center, were included.

Methods:

This retrospective study involved 3401 myopic LASIK between 2002 and 2005. Pre- and postoperative uncorrected and best-corrected visual acuity (UCVA and BCVA, logMAR) and spherical equivalent (SE) were recorded. The main outcomes were efficacy, safety, and refractive predictability. The efficacy and safety indexes were calculated as follows: efficacy index = (UCVApostoperative / BCVApreoperative); safety index = (BCVApostoperative / BCVApreoperative). To show the predictability of LASIK, the postoperative spherical equivalent (SE), topographical cylinder, and the frequencies of postoperative SE within ± 0.50 D and ± 1.00 D were investigated at all follow-up visits.

Results:

Compared with the UCVA at 1 month postoperatively, that at 3 months significantly decreased (P=.002) and that at 2 and 3 years significantly increased (p<.001). Over the 2 year postoperative period, the refractive predictability within ±1.00 and ± 0.50 D ranged from 69.0 to 86.2% and from 43.3 to 67.8%, respectively. Multivariate regression analysis showed higher preoperative SE (P<.001) and lower preoperative BCVA (P=.003) were predictive of lower efficacy.

Conclusions:

Myopic LASIK can be effective and safe with high refractive predictability in Koreans, although myopic regression occurs as time passed.

Financial Disclosure:

None