Effect of Laser in Situ Keratomilieusis with Flying Spot Beam Laser on Astigmatic Correction

ABSTRACT

PURPOSE: The authors studied the results of laser in situ keratomileusis for correction of myopic astigmatism with flying spot beam laser. METHODS: The authors studied the results of 179 eyes of 122 patients who had undergone excimer laser in situ keratomileusis for correction of myopic astigmatism with flying spot beam laser and had had preoperative atigmatism greater than 0.5 diopter (D). Patients were divided into group I (0.50D-0.75D), II (1.00D-1.75D), III (2.00D-2.75D), and IV (3.00D-6.00D), Each patient were followed up for over 6 months. Refractive errors and uncorrected visual acuity (UCVA) were measured at 1week, 1, 3, and 6 months after operation, respectively RESULTS: The mean age of the patients was 29 years (19-50 years). In group I, II, III, and IV, preoperative cylindrical power were 0.61+/-0.12D, 1.26+/-0.24D, 2.26+/-0.28D, and 3.34+/-0.33D, respectively. And postoperative astigmatism were 0.11+/-0.25D, 0.16+/-0.31D, 0.63+/-0.55D, 0.45+/-0.67D at postoperative 3 month and 0.08+/-0.24D, 0.17+/-0.31D, 0.29+/-0.47D, 0.16+/-0.32D at postoperative 6month, respectively. At 6 months, there is no statistically significant difference compared with the mean cylindrical power between the two groups. CONCLUSIONS: The astigmatic correction with flying spot beam laser showed effective and stable results regardless of the preoperative cylindrical power.