Influence of Surface Fluid during Photorefractive Keratectomy Using a 213-nm Solid-State Laser.
10.3341/jkos.2008.49.11.1723
- Author:
Kwan Soo KIM
1
;
Chul Young CHOI
;
Hungwon TCHAH
Author Information
1. Department of Ophthalmology, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Seoul, Korea. sashimi0@naver.com
- Publication Type:Original Article ; Clinical Trial
- Keywords:
213-nm solid-state laser;
Ablation efficacy;
Ablation rate;
Photorefractive keratectomy;
Surface fluid
- MeSH:
Eye;
Lasers, Solid-State;
Photorefractive Keratectomy;
Porifera;
Rabbits
- From:Journal of the Korean Ophthalmological Society
2008;49(11):1723-1728
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To investigate the effect of surface fluid on the ablation rate and efficacy of 213-nm solid-state laser during photorefractive keratectomy (PRK). METHODS: Twelve rabbits (24 eyes) underwent myopic PRK for the correction of 10 diopters using 213-nm solid-state laser. Photoablation was performed with removal of corneal surface fluid using the Weckcel(R) sponge every 5 seconds in one eye and without removal of corneal surface fluid in the control eye. The mean central corneal thickness (CCT) was evaluated preoperatively, and at 1 week, 4 weeks postoperatively. RESULTS: The mean CCT of group 1 (with removal of corneal surface fluid) were 361.3+/-13.9 micrometer preoperatively and 321.4+/-18.5 micrometer at 4 weeks postoperatively. The mean CCT of group 2 (without removal of surface fluid) were 358.7+/-8.9 micrometer preoperatively and 338.4+/-12.0 micrometer at 4 weeks postoperatively. The mean ablation depths were 39.8+/-7.4 micrometer in group 1 and 20.3+/-5.8 micrometer in group 2 at 4 weeks postoperatively p<0.05). CONCLUSIONS: Induced corneal surface fluid during PRK may influence the ablation efficacy and accuracy of solid-state laser. This result should be considered in clinical trialswith 213-nm solid-state laser, especially in high myopes.
