Comparison of Clinical Result of Epithelial Removal during Phtorefractive Keratectomy with Blade to Brush.
- Author:
Eun Chul KIM
1
;
Choun Ki JOO
Author Information
1. Department of Ophthalmology and Laboratory of Visual Science, College of Medicine, The Catholic university of Korea, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
PRK;
Brush;
Blade
- MeSH:
Follow-Up Studies;
Photorefractive Keratectomy;
Postoperative Period;
Visual Acuity
- From:Journal of the Korean Ophthalmological Society
2002;43(7):1138-1144
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To compare the clinical results of photorefractive keratectomy using blade and those of using brush for epithelial removal. METHODS: We have followed up the forty four eyes which were deepithelized using blade(group 1) and the forty four eyes done using brush(group 2). RESULTS: The mean follow-up months was 8.09+/-0.02 in group 1 and 8.36+/-0.91 in group 2. The percentage of eyes which uncorrected visual acuity(UCVA) is better than 20/40 was 77%, 93%, 98% in group 1 and 86%, 97%, 100% in group 2, and better than 20/25 was 31%, 75%, 93% in group 1 and 38%, 77%, 100% in group 2 at 1 week, 2 and 6 months, respectively. And there is no statistical difference between group 1 and 2(p>0.05) about the percentage of eyes with UCVA better than 20/24 and 20/25. Postoperative mean spherical equivalent(D)(Mean +/-2SD) of group 1 was 0.63+/-0.11 and that of group 2 was -0.0038+/-0.93 at 1 week. This means that group 1 was significantly(p=0.004) more overcorrected than group 2 at 1 week. The predictability of operation(the percentage of eyes of which spherical equivalent was lesser than +/-0.5D) was 43%, 50%, 57% in group 1 and 55%, 64%, 67% in group 2 at 1 week, 2, and 6 months, respectively. Group 2 showed higher predictability of operation than group 1, but there was no statistical difference. Postoperative corneal thickness and IOP changes between the two groups was not statistically different(p>0.05). CONCLUSIONS: These results show that epithelial removal during PRK using brush was less overcorrected at early postoperative period, and could get as good refractive result and uncorrected visual acuity as that using blade.
