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Abstract #46094 Published in IGR 13-2
Validity and limits of the rebound tonometer (ICare((registered trademark))): Clinical study
Scuderi GL; Cascone NC; Regine F; Perdicchi A; Cerulli A; Recupero SMEuropean Journal of Ophthalmology 2011; 21: 251-257
Purpose. The aim of this study was to evaluate the measurement of intraocular pressure (IOP) using a new induction/impact rebound tonometer (ICare((registered trademark))) compared with Goldmann applanation tonometry (GAT). We also aimed to quantify the systematic and random errors (bias) of the 2 methods, to evaluate the sensitivity and specificity of the ICare((registered trademark)) tonometer in identifying patients with 21 mmHg or more measured with the GAT, and to study the influence of corneal thickness on IOP measurement with the 2 tonometers. Methods. We compared the IOP values obtained with the 2 instruments in 97 patients. Results. Analysis based on the Bland and Altman method revealed that the IOP values recorded with the ICare((registered trademark)) tonometer were slightly higher than those obtained with the GAT. The estimated bias for right eye measurements was 0.78 mmHg with 95% limits of agreement (plus or minus)3.55 mmHg. This overestimation, which is not clinically relevant, was confirmed when we used the IOP values corrected according to central corneal thickness for data analysis. The sensitivity and specificity were 0.90 and 0.95, respectively. Co n Conclusions. The ICare((registered trademark)) tonometer proved to be comparable with other nonconventional tonometers and can be used by nonophthalmologists and paramedical personnel during screening tests of populations. In addition, the ICare((registered trademark)) tonometer could be considered a valid alternative to GAT when GAT is not available.
N. C. Cascone. Via G. Candeo 8, 00154 Rome, Italy. Email: nikhil.cascone@uniroma1.it
Classification:
6.1.1 Devices, techniques (Part of: 6 Clinical examination methods > 6.1 Intraocular pressure measurement; factors affecting IOP)
