Journal of the Korean Ophthalmological Society 2003;44(3):562-571.
Published online March 1, 2003.
Excimer Laser Photorefractive Keratectomy with a Rotary Epithelial Scrubber and Post-laser Corneal Chilling.
Sang Bumm Lee, Jung Ho Lee
Department of Ophthalmology, Yeungnam University College of Medicine, Taegu, Korea. sbummlee@med.yu.ac.kr
상피제거회전솔과 차가운 평형염액 세척을 이용한 엑시머레이저 굴절교정각막절제술
이상범 ( Sang Bumm Lee ) , 이정호 ( Jung Ho Lee )
Abstract
PURPOSE
To evaluate the effect of rotary epithelial scrubber and post-laser corneal chilling on clinical outcomes of excimer laser PRK (VISX 20/20B VisionKeyTM) METHODS: PRK with a rotary epithelial scrubber and post-laser chilled BSS irrigation was performed in 231 eyes of 141 patients (Group I: -4.33+/-0.98 D, July 1997~July 1999). Conventional PRK with mechanical epithelial removal was performed in 282 eyes of 181 patients (Group II: -4.33+/-0.99 D, September 1994~April 1997). A retrospective clinical data of two different PRK procedures was compared. RESULTS: Mean epithelial removal time was significantly short in group I (8.6+/-3.4 sec) than in group II (29.8+/-12.8 sec) (p<0.05). More rapid epithelial healing was achieved in group I (2.6+/-0.7 days) than in group II (2.8+/-0.7 days) (p<0.05). At 12 months, UCVA was 0.7 or better in 99.4% (162/163 eyes) of group I and 92.8% (77/88 eyes) of group II (p<0.05). At 12 months, 98.8% (161/163 eyes) in group I and 95.2% (79/83 eyes) in group II were within +/-1.0 D of emmetropia (p<0.05). After 2 years follow-up, there were no cases showing corneal haze worse than grade 1 in group I. CONCLUSIONS: Excimer laser PRK after precise removal of the epithelium with a rotary scrubber and post-laser corneal chilling provided more rapid epithelialization and visual recovery than conventional PRK. There was statistically significant improvement in clinical outcomes and occurrence of corneal haze in group I comparing with group II. We think that this excimer laser PRK technique be more ideal for the correction of mild to moderate myopia to avoid the serious flap complication of LASIK.
Key Words: Excimer laser PRK;Post-laser chilled BSS irrigation;Rotary epithelial scrubber


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