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

Lee, Joo Yong; Tchah, Hung Won

Original Article

Journal of the Korean Ophthalmological Society 2003;44(8):1757-1763.
Published online August 1, 2003.

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

Joo Yong Lee, Hung Won Tchah

Department of Ophthalmology, Asan Medical Center Ulsan University College of Medicine, Korea. hwtchah@amc.seoul.kr

Flying Spot Beam Laser을 이용한 LASIK 수술 후 난시의 교정 효과

이주용 ( Lee Ju Yong ) , 차흥원 ( Cha Heung Won )

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.

Key Words: Astigmatism;Laser in situ keratomileusis (LASIK);Refraction