title: Agreement of rebound tonometer in measuring intraocular pressure with three types of applanation tonometers.
abstract: OBJECTIVE
  To evaluate the agreement of iCare rebound tonometer in measuring intraocular pressure (IOP) with Goldmann applanation tonometer (GAT), Tonopen XL, and noncontact tonometer, and the influence of the central corneal thickness (CCT) on IOP measurements made with these four tonometers in 45 (12 control and 33 glaucomatous or ocular hypertensive) eyes.
  
  
  METHODS
  Clinically relevant experimental study.
  
  
  METHODS
  Tonometer intermethod agreement was assessed by the Bland-Altman method. The relations of CCT with absolute IOP values and intertonometer differences were analyzed by linear regression.
  
  
  RESULTS
  The mean differences (95% limits of agreement) in IOP readings between iCare and GAT, Tonopen XL, and noncontact tonometer were 1.40 +/- 4.29, 0.00 +/- 4.78, and 2.22 +/- 4.19 mm Hg, respectively. All tonometries had a marked association with CCT. As the CCT got thicker, iCare considerably overestimated GAT and Tonopen XL.
  
  
  CONCLUSIONS
  Although influenced by CCT, iCare agrees well with applanation tonometers.
authors.affiliation: Division of Ophthalmology, Department of Organs Therapeutics, Kobe University Graduate School of Medicine, Kobe, Japan.
authors.forename: Makoto
authors.initials: M
authors.lastname: Nakamura
authors.forename: Urtogtah
authors.initials: U
authors.lastname: Darhad
authors.forename: Yasuko
authors.initials: Y
authors.lastname: Tatsumi
authors.forename: Miyuki
authors.initials: M
authors.lastname: Fujioka
authors.forename: Azusa
authors.initials: A
authors.lastname: Kusuhara
authors.forename: Hidetaka
authors.initials: H
authors.lastname: Maeda
authors.forename: Akira
authors.initials: A
authors.lastname: Negi
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003315:Cornea / Q000473:pathology; D005260:Female; D005901:Glaucoma / Q000503:physiopathology*; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D009798:Ocular Hypertension / Q000503:physiopathology; D015203:Reproducibility of Results; D014065:Tonometry, Ocular / Q000295:instrumentation / Q000379:methods*