Purpose. A new eyeball fixation device, which enables the surgeon to fix the patient's eyeball directly to the headrest of the patient's chair firmly during PRK, was designed. The purpose of this study is to compare the epithelial healing time between the corneas ablated with fixation and those without fixation during PRK. Methods. The new fixation device is composed of two parts. One small part has suction ring connected to the metal plate. The other part, fixed to the headrest of the patient's chair, is composed of metal frame and another metal plate. For PRK, surgeon fixed the eyeball with suction ring by applying suction(64 mm Hg) and an assistant matched and clipped two metal plates together so that eyeball could be fixed to the headrest of the patient's chair. PRK was performed without the fixation device(J.t?. self fixation) on one eye and with fixation device on the other eye(n=31 ). Paired t-tests for the amount of ablation and epithelial healing time were performed between the groups with and without fixation. Results. There were no statistically significant difference(p=0.10) with the amounts of ablation between two groups. The epithelial healing time were 3.50 ± 1.11 days in non-fixated eyes and 2.47 + 0.51 days in fixated eyes( p< 0.01 ). Conclusions. Epithelial healing time could be shortened with fixation during PRK. Also, the epithelial healing times in the fixation group were more uniform(SD = ± 0.51 days) than those in non-fixation group(SD = ± 1.11 days). There were two cases of delayed wound healing(6 or 7 days) only in the nonfixation group.
|Journal||Investigative Ophthalmology and Visual Science|
|Publication status||Published - 1997 Dec 1|
All Science Journal Classification (ASJC) codes
- Sensory Systems
- Cellular and Molecular Neuroscience