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Comparison of the Icare ic100 rebound tonometer and the Goldmann Applanation Tonometer in 1,000 Eyes

Subramaniam, AG, Allen, P ORCID: 0000-0003-1945-8049 and Toh, T 2021 , 'Comparison of the Icare ic100 rebound tonometer and the Goldmann Applanation Tonometer in 1,000 Eyes' , Ophthalmic Research, vol. 64, no. 2 , pp. 321-326 , doi: 10.1159/000511455.

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Background: Measurement of intraocular pressure (IOP) forms a crucial component in the diagnosis and management of glaucoma. Many devices have been developed to measure IOP with Goldmann applanation tonometry (GAT) considered the gold standard for IOP measurement.Objectives: The objective was to compare the IOP measured using Icare ic100 and GAT.Methods: This cross-sectional study measured IOP in 1,000 eyes (500 left and 500 right) using the Icare ic100 and GAT. Central corneal thickness (CCT) was measured using a hand-held pachymeter. IOP measurements were investigated in all eyes, by IOP substrata, by CCT group, by number of topical glaucoma medications, and diagnosis.Results: There was moderate agreement between ic100 and GAT IOP measurements (intraclass correlation coefficient 0.73). Mean IOP was significantly lower when measured by ic100 than by GAT (12.1 vs. 16.2 mm Hg, p Conclusions: The Icare tonometer consistently under estimated IOP compared to GAT, irrespective of CCT ranges and other subgroup analyses. The mean difference of 4.2 mm Hg can have significant clinical implications, particularly in the management of glaucoma patients.

Item Type: Article
Authors/Creators:Subramaniam, AG and Allen, P and Toh, T
Keywords: Goldmann applanation tonometer, Icare rebound tonometer, intraocular pressure
Journal or Publication Title: Ophthalmic Research
Publisher: Karger
ISSN: 0030-3747
DOI / ID Number: 10.1159/000511455
Copyright Information:

Copyright 2020 S. Karger AG, Basel

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