ABSTRACT
The purpose of this study is to determine the safety and efficacy of laser in situ keratoinileusis [LASIK] enhancement and to present the outcomes. Retrospective non-comparative consecutive case series was done on 20 eyes of 16 patients underwent LASIK surgery for refractive error using the excimer laser [Nidek EC-5000, Japan]. Only re-treatments for residual refractive error were included. Of the total cohort studied 1000 eyes done over a 2 years period, 20 eyes [2%] were subjected to LASIK enhancement. The average length of time between initial treatment and enhancement was 8.6 months; 90% of retreatments took place within the first year, only 2 eyes [10%] between 1-2 years All of the retreatments were accomplished using a manual flap lift approach; none of the eyes required repeated microkeratome cut. Before retreatment, average BCVA was 0.7 [20/30] and after retreatment was 0.705 [20/30] [p > 0.05] statistically non-significant. The MRSE pre-enhancement for myopic cases was -2.25 D and decreased significantly after enhancement to -0.4 D, while for the hyperopic MRSE was +1.75 D pre-enhancement and decreased significantly to +0.25 D after enhancement. Higher initial oorrections and residual astigmatism were associated with a significantly higher rate of retreatments. LASIK enhancements surgery can be performed safely and effectively by lifting the flap