Effect of laser in situ keratomileusis on rebound tonometry and Goldmann applanation tonometry

Kwok Cheung Andrew Lam, Ricky Wu, Zheng Wang, Victor Woo, Elice Chan, Kenny Tam, Ricky Chau, Kin keung Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

16 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)631-636
Number of pages6
JournalJournal of Cataract and Refractive Surgery
Issue number4
Publication statusPublished - 1 Apr 2010

ASJC Scopus subject areas

  • Surgery
  • Ophthalmology
  • Sensory Systems

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