Clinical Result of Excimer Laser Park.

Do, Ki Kong; Lee, Do Yong; Park, Soo Jeong

Original Article

Journal of the Korean Ophthalmological Society 1997;38(1):7-16.
Published online January 1, 1997.

Clinical Result of Excimer Laser Park.

Ki Kong Do, Do Yong Lee, Soo Jeong Park

Department of Ophthalmology, Maryknoll Hospital, Pusna, Korea.

엑시머레이저를 이용한 복합근시성난시교정시술의 효과

도기공(Ki Kong Do),이도용(Do Yong Lee),박수정(Soo Jeong Park)

Abstract

We evaluated the effectiveness of photoastigmatic refractive Keratectomy(PARK) by excimer laser on patients with compound myopic astigmatism. Spherocylindrical PARK was performed on 181 myopic eyes with astigmatism(mean spherical equivalent : -6.61 D, range : -1.88~-14.5 D) using the visx excimer laser. The eyes were divided into three groups according to the amount of desired astigmatic correction : Group 1(-0.5~-1.0 D), Group 2(-1.25~3.0 D), and Group 3(-3.25~-5.5 D). Patients were followed up for 6 months. Uncorrected visual acuity at postoperative 6 month, was 0.80+/-0.27 in Group 1, 0.79+/-0.19 and 0.71+/-0.21bin Group 2 and 3 respectively. The mean spherical equivalent refraction was -0.24 D 6 months after PARK. Mean astigmatism was reduced from preoperative -0.85+/-0.51 D to postoperative -0.34+/-0.38 D in Group 1, from -2.08+/-0.65 D to -0.43+/-0.64 D and from -4.42+/-0.63 D to -1.23+/-1.25 D in Group 2 and 3 respectively. We also analyzed the angle of error, magnitude of error, index of success, and coefficient of afjustment by vector analysis. No significant complications were observed during the follow-up period. These results show that PARK by excimer laser was effective in correction of astigmatism. The effect of astigmatic correction in Group 2 and 3 were better than that of Group 1. Group 1 showed overcorrected tendency and Group 2 and 3 showed undercorrected tendency.

Key Words: Compound myopic astigmatism;Excimer laser;Photoastigmatic refractive keratectomy