Purpose: To determine the influence of refractive surgery on intraocular pressure (IOP) measurements obtained using an iCare rebound tonometer and a Goldmann applanation tonometer. Setting: School of Optometry, Hong Kong Polytechnic University, Hong Kong, China. Methods: Intraocular pressure was measured using the rebound tonometer and applanation tonometer before and 1 month after uneventful LASIK for myopia. Results: The IOP was measured in 96 eyes (96 patients). The preoperative IOP measured by rebound tonometry (mean 16.7 mm Hg ± 3.0 [SD]) was statistically significantly higher than by Goldmann applanation tonometry (mean 15.4 ± 2.5 mm Hg) (P<.01, Wilcoxon test). There was no statistically significantly difference in postoperative measurements between the 2 tonometers (mean 11.9 ± 2.6 mm Hg and 12.0 ± 2.4 mm Hg, respectively) (P>.05, Wilcoxon test). The mean difference between the 2 tonometers after LASIK was 0.1 ± 2.1 mm Hg. The 95% limits of agreement ranged from -4.26 to 4.05 mm Hg. The IOP reduction with rebound tonometry was positively correlated with preoperative IOP. Conclusion: There was a greater decrease in IOP measurement after LASIK by rebound tonometry, showing this method was more affected by surgery. Financial Disclosure: No author has a financial or proprietary interest in any material or method mentioned.
ASJC Scopus subject areas
- Sensory Systems