Comparison of Refractive Outcomes of Broad Beam and Flying Spot Excimer Laser after Photorefractive Keratectomy.

Cho, Hyunsu; Tchah, Hung Won

Original Article

Journal of the Korean Ophthalmological Society 2003;44(9):2105-2110.
Published online September 1, 2003.

Comparison of Refractive Outcomes of Broad Beam and Flying Spot Excimer Laser after Photorefractive Keratectomy.

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

PRK 에서의 Broad Beam Laser와 Flying Spot Laser에 의한 시력 교정 효과의 비교

조현수 ( Jo Hyeon Su ) , 차흥원 ( Cha Heung Won )

Abstract

PURPOSE
To assess the refractive outcomes in photorefractive keratectomy (PRK) of two eximer lasers: Broad beam and Flying spot laser. METHODS: We compared the refractive outcomes of 74 eyes (group I) treated with a VISX 20/20(excimer laser (VISX Inc. USA) using broad beam laser with those of 96 eyes (group II) treated with a Technolas 217 C-Lasik(TM) (Bausch and Lomb, USA) using flying spot laser. Each patients had been followed up for more than 6 months after surgery. RESULTS: Corneal astigmatism at preoperation were 1.25 +/- 0.62D in group I and 1.03 +/- 0.51D in group II and at postoperative 6 months, decreased to 1.12 +/- 0.53D in group I and 0.60 +/- 0.83D in group II. Manifest refraction were outside +/- 1D of spherical lens or 0.5 D of cylinder lens in 23.6 % in group I and 13.5% in group II. CONCLUSIONS: We suggests that PRK using flying spot laser effectively more reduces corneal astigmatism and provided more satisfactory predictability in refractive results than that of broad beam laser.

Key Words: Photorefractive keratectomy;Technolas 217 C-Lasik;VISX 20/20