Abstract
Abstract: :
Purpose: To assess the safety and efficacy of laser in situ keratomileusis (LASIK) in eyes with previous radial-keratotomy (RK). Methods: Twenty-three eyes of 15 patients were treated with LASIK for consecutive hyperopia (22 eyes) or mixed astigmatism (1 eye) after RK using VISX STARS2, VISX STARS3 and LADAR Vision excimer lasers. Flaps were created with a Hansatome keratome. Results: The mean time period after RK was 12.13 (4.89) years. The absolute mean pre-operative spherical equivalent refraction was 2.46 (1.26) diopters (D). The mean pre-operative spherical refractive error was +1.89 (1.21) D and mean cylindrical error was +1.09 (0.80) D for the eyes with consecutive hyperopia. The only eye with mixed astigmatism had -5.25 D spherical and +4.75 D cylindrical refractive error. Post-operative mean follow-up time was 7.21 (4.93) months. Absolute mean post-operative spherical equivalent refraction was 0.59 (0.46) D. Post-operatively uncorrected visual acuity (UCVA) improved in 20 eyes, stayed at the same level in 1 eye and 2 eyes lost 1 line. Best corrected visual acuity (BCVA) improved in 6 eyes, did not change in 10 eyes, and decreased 1 line in 7 eyes. The only intra-operative complication was a button-hole flap formation in one eye, in which a new flap was cut and LASIK was done successfully 4 months later. Conclusion: LASIK is a safe and effective treatment for properly selected patients with overcorrection or undercorrection after RK.
Keywords: 548 refractive surgery: LASIK • 549 refractive surgery: other technologies