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Abstract #46173 Published in IGR 13-2
Clinical evaluation of the IOPen(registered trademark) in a glaucomatous population
Jorge J; Fernandes P; Queiros A; Ribeiro P; Ferreira A; Gonzalez-Meijome JMOphthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians 2010; 30: 860-864
The aim of this study was to evaluate the level of agreement of measurements of intraocular pressure (IOP) taken by a rebound tonometer (IOPen(registered trademark)), in comparison to a reference Goldmann applanation tonometer (GAT) in a glaucomatous population. Both eyes from 60 patients were assessed with the two tonometers, the induction tonometry was performed first by an experienced optometrist, and the GAT by an ophthalmologist. In this study, statistically significant differences were found when comparing the IOPen(registered trademark) tonometer with the GAT tonometer (p < 0.001), mean differences were -4.81 (plus or minus) 4.31 and -4.76 (plus or minus) 5.76 mmHg (mean (plus or minus) S.D.) for the right eye and left eye respectively These values represent an underestimation in the present population by the IOPen(registered trademark) when compared with the GAT. Frequency distribution of differences demonstrated that in more than 71.6% of the measurements the IOP readings differed by more than 3 mmHg between the two tonometers. These results suggest that IOPen(registered trademark) should be used with great caution in the determination of IOP.
J. Jorge. Center of Physics, School of Science, University of Minho, Campus de Gualtar, Braga, Portugal. Email: jorge@fisica.uminho.pt
Classification:
6.1.1 Devices, techniques (Part of: 6 Clinical examination methods > 6.1 Intraocular pressure measurement; factors affecting IOP)
