title: Effect of laser in situ keratomileusis on rebound tonometry and Goldmann applanation tonometry.
abstract: OBJECTIVE
  To determine the influence of refractive surgery on intraocular pressure (IOP) measurements obtained using an iCare rebound tonometer and a Goldmann applanation tonometer.
  
  
  METHODS
  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.
  
  
  CONCLUSIONS
  There was a greater decrease in IOP measurement after LASIK by rebound tonometry, showing this method was more affected by surgery.
authors.affiliation: School of Optometry, Hong Kong Polytechnic University, Hong Kong, China. sokclam@polyu.edu.hk
authors.forename: Andrew K C
authors.initials: AK
authors.lastname: Lam
authors.forename: Ricky
authors.initials: R
authors.lastname: Wu
authors.forename: Zheng
authors.initials: Z
authors.lastname: Wang
authors.forename: Victor
authors.initials: V
authors.lastname: Woo
authors.forename: Elice
authors.initials: E
authors.lastname: Chan
authors.forename: Kenny
authors.initials: K
authors.lastname: Tam
authors.forename: Ricky
authors.initials: R
authors.lastname: Chau
authors.forename: Kin-Keung
authors.initials: KK
authors.lastname: Wong
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology*; D020731:Keratomileusis, Laser In Situ; D054018:Lasers, Excimer / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000503:physiopathology / Q000601:surgery*; D011446:Prospective Studies; D015203:Reproducibility of Results; D014065:Tonometry, Ocular / Q000295:instrumentation*; D055815:Young Adult