Accuracy of the ICare rebound tonometer in glaucomatous eyes with topical ocular hypotensive medication

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
Alberto DiazMa Jesus Giraldez

Abstract

The purpose of this study was to assess the accuracy of the ICare tonometer, using the Perkins applanation tonometer (AT) as the reference, in a sample population being treated with travaprost 0.004% for glaucoma. Twenty-eight consecutive patients with open-angle glaucoma or ocular hypertension who had been receiving travaprost 0.004% to control elevated intraocular pressure (IOP) were included in the study. IOP was measured in the entire sample with ICare and Perkins AT. The difference between the methods was plotted against the mean to compare the tonometers. The hypothesis of zero bias was examined by a paired t-test. The 95% limits of agreement (LoA) were also calculated. As previously found in young healthy subjects, ICare showed a tendency to overestimate Perkins IOP measurements by a mean of 3.57 mmHg. The agreement between the two methods is shown by the 95% LoA which was from -9.37 to +2.23 mmHg: 53% of the IOP differences fell within +/-3 mmHg. The performance of the ICare tonometer in glaucomatous patients being treated with travaprost 0.004% to lower the IOP appears to be similar to that of young healthy patients. The tendency of ICare to overestimate the IOP readings should be considered when the instrument is used...Continue Reading

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Citations

May 7, 2010·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·J JorgeJ M Gonzalez-Meijome
Jan 6, 2011·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·J JorgeJ M Gonzalez-Meijome
Feb 12, 2011·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Jorge JorgeJosé A Diaz-Rey
Nov 20, 2012·Journal of AAPOS : the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus·Florin GrigorianScott E Olitsky
Mar 23, 2011·Journal of AAPOS : the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus·Meghan S FlemmonsSharon F Freedman
Jun 13, 2015·Asia-Pacific Journal of Ophthalmology·Brenda Nuyen, Kaweh Mansouri
Oct 5, 2010·European Journal of Ophthalmology·Marino MariniTiziana Canziani

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