Test - Retest variability of intraocular pressure and ocular pulse amplitude for dynamic contour tonometry: A multicentre study

Paolo Fogagnolo, M. Figus, P. Frezzotti, M. Iester, F. Oddone, M. Zeppieri, A. Ferreras, P. Brusini, L. Rossetti, N. Orzalesi

Research output: Contribution to journalArticlepeer-review

Abstract

Aims: To assess the test - retest variability of intraocular pressure (IOP) and ocular pulse amplitude (OPA) measurements utilising dynamic contour tonometry (DCT) and to evaluate possible influential factors. Methods: The study included 350 consecutive subjects (175 glaucoma, 175 control; one eye per subject) from seven European centres. IOP was measured once with a Goldmann applanation tonometer (GAT) and twice by DCT (DCT1, DCT2) in a randomised sequence. OPA was also recorded for both DCT measurements. Differences (DCT1-DCT2; OPA1-OPA2; GAT-DCT1; GAT-DCT2) were assessed using the t test. The intraclass coefficient of correlation (ICC) and coefficient of variation (CoV) for DCT and OPA were calculated. Results: DCT1 was 0.661.6 mmHg higher than DCT2 (p0.90 and >0.76, and CoV=4.8-5.0% and 10.3-10.5%, respectively. DCT1 and 2 were 2.4±2.6 and 1.8±2.6 mm Hg higher respectively than GAT (p

Original languageEnglish
Pages (from-to)419-423
Number of pages5
JournalBritish Journal of Ophthalmology
Volume94
Issue number4
DOIs
Publication statusPublished - Apr 2010

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

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