Clinical Study On Laser In Keratomileusis For Treatment Of Undercorrection After Radial Keratotomy

PurposeTo evaluate the safety, efficacy, and predictability of laser in situ keratomileusis(LASIK) in selected post-radial-keratotomy(RK) eyes with residual myopia and/or astigmatism.MethodsThis retrospective nonconsecutive case series comprised 52 eyes of 27 patients who had LASIK to correct residual myopia and/or astigmatism after RK. All eyes were more than 4 years post-RK, had no epithelial inclusion cysts or corneal disease. The eyes were divided into 2 groups based on the treatment institute. In group A, 26 eyes of 13 patients were performed LASIK by the same surgeon at the Eye center of Guangxi medical university first clinical hospital. In group B, 26 eyes of 14 patients were performed LASIK at the ophthalmology department of Guangxi national hospital .the follow up in these eyes was 12 months.ResultsThe vision and refractive status were stable by 3 months. At the last follow-up , 24 eyes (92.3%) had a refractive error within±1.0D of emmetropia and 23 eyes (88.5%) had an uncorrected visual acuity (UCVA) of 1.0 or better in group A .The mean spherical equivalent (SE) was -0.50D±0.47 (SD) .In group B, 23 eyes (88.5%) had a refractive error within±1.0D of emmetropia and 23 eyes (88.5%) had an UCVA of 1.0 or better . the mean spherical equivalent (SE) was -0.22D±0.61 (SD) .No eye lost 2 Snellen line of best corrected visual acuity (BCVA). No dislocation, loss of flap, corneal haze or epithelial ingrowths was found.ConclusionsLaser in situ keratomileusis is safe, efficacious and predictability for reducing residual myopia and/or astigmatism in properly selected RK patients.