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Graefe's Archive for Clinical and Experimental Ophthalmology

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01-11-2011 | Glaucoma

A new rebound tonometer for home monitoring of intraocular pressure

Authors: André Rosentreter, Kerstin S. Jablonski, Anne C. Mellein, Stergiani Gaki, Arno Hueber, Thomas S. Dietlein

Published in: Graefe's Archive for Clinical and Experimental Ophthalmology | Issue 11/2011

Abstract

Background

To compare intraocular pressure (IOP) measurements obtained by the Icare ONE rebound tonometer (RTONE) and the Goldmann applanation tonometer (GAT) in healthy persons and glaucoma patients in a prospective study, and to investigate the influence of central corneal thickness (CCT).

Methods

Measurements on 126 right eyes were obtained by three equally skilled ophthalmologists with each of the above-mentioned tonometers. In addition, patients measured their own IOP with the RTONE (RTONE(p)). The means and standard deviation for all tonometers were compared. Agreement between the tonometers was calculated using the Bland–Altman method.

Results

A total of 95 (75.3%) patients were able to perform correct self-tonometry. Mean IOPs obtained were 17.1 ± 5.9 mmHg (RTONE performed by ophthalmologist: RTONE (o)), 17.3 ± 5.6 mmHg (RTONE(p)) and 16.5 ± 5.1 mmHg (GAT). Correlation analysis indicated a good correlation between IOP readings obtained using RTONE(o) and RTONE(p) (ρ = 0.916; p < 0.001) and RTONE(o) and GAT (ρ = 0.901; p < 0.001). Bland–Altman analysis revealed a mean difference (bias) between RTONE(o) and RTONE(p), between RTONE(o) and GAT, and between RTONE(p) and GAT of −0.2, 0.6, and 0.8 mmHg, respectively, with 95% limits of agreement of −5.0 to 4.5, –4.4 to 5.6, and −4.6 to 6.1 mmHg, respectively. The difference between RTONE(o) and GAT significantly increased with increasing CCT (ρ = 0.004), with a 10% increase in CCT resulting in a 1.8% increase in the difference.

Conclusions

Measurements obtained with the RTONE, either by an ophthalmologist or by the patient, showed an excellent correlation with those provided by applanation tonometry. RTONE generally tends to overestimate IOP compared to GAT readings and displays a dependence on CCT.

This study was registered with the DRKS (German Clinical Trials Register; www.germanctr.de; DRKS00000478).

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Title: A new rebound tonometer for home monitoring of intraocular pressure
Authors: André Rosentreter
Kerstin S. Jablonski
Anne C. Mellein
Stergiani Gaki
Arno Hueber
Thomas S. Dietlein
Publication date: 01-11-2011
Publisher: Springer-Verlag
Published in: Graefe's Archive for Clinical and Experimental Ophthalmology / Issue 11/2011
Print ISSN: 0721-832X
Electronic ISSN: 1435-702X
DOI: https://doi.org/10.1007/s00417-011-1785-7

Keynote webinar | Spotlight on medication adherence

Springer Medicine

A new rebound tonometer for home monitoring of intraocular pressure

Abstract

Background

Methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

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