Clinical Result of Excimer Laser Park.
- Author:
Ki Kong DO
1
;
Do Yong LEE
;
Soo Jeong PARK
Author Information
1. Department of Ophthalmology, Maryknoll Hospital, Pusna, Korea.
- Publication Type:Original Article
- Keywords:
Compound myopic astigmatism;
Excimer laser;
Photoastigmatic refractive keratectomy
- MeSH:
Astigmatism;
Follow-Up Studies;
Humans;
Lasers, Excimer*;
Visual Acuity
- From:Journal of the Korean Ophthalmological Society
1997;38(1):7-16
- CountryRepublic of Korea
- Language:Korean
-
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.
