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International Ophthalmology

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01-02-2020 | Measurement of Intraocular Pressure | Original Paper

Error in measurement of intraocular pressure with the Icare and IcarePRO

Authors: Mitsuya Otsuka, Naoki Tojo, Atsushi Hayashi

Published in: International Ophthalmology | Issue 2/2020

Abstract

Purpose

We sought to determine whether changes in the measurement angle of the Icare TA01i and IcarePRO tonometers led to errors in the measurement of intraocular pressure (IOP).

Methods

In this prospective, single-facility study, we analyzed 77 patients from November 2017 to September 2019. We measured IOP with the Icare TA01i and IcarePRO while changing the angle of the device with the cornea center and analyzed the associated changes in the measurement.

Results

IOP measured with the Icare tilted − 30°, − 15° vertically was significantly higher than that measured with the Icare tilted horizontally (p < 0.0001, p < 0.0001). The IOP measured with a + 10° vertical tilt was significantly lower than that measured horizontally (p < 0.0001). When the IcarePRO was tilted + 90° vertically, the IOP was significantly lower with the patient in the supine position than in the lateral position (p = 0.00058).

Conclusions

IOP measured with the Icare and IcarePRO is affected by the measurement angle. The study results will direct the clinicians to exercise extra precautions in determining the measurement angle while measuring IOP.

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Title: Error in measurement of intraocular pressure with the Icare and IcarePRO
Authors: Mitsuya Otsuka
Naoki Tojo
Atsushi Hayashi
Publication date: 01-02-2020
Publisher: Springer Netherlands
Keyword: Measurement of Intraocular Pressure
Published in: International Ophthalmology / Issue 2/2020
Print ISSN: 0165-5701
Electronic ISSN: 1573-2630
DOI: https://doi.org/10.1007/s10792-019-01204-7

At a glance: The STEP trials

Springer Medicine

Error in measurement of intraocular pressure with the Icare and IcarePRO

Abstract

Purpose

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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