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Abstract #8304 Published in IGR 4-3
Clinical performance of the Reichert AT550: a new non-contact tonometer
Jorge J; Diaz-Rey JA; Gonzalez-Meijome JM; Almeida JB; Parafita MAOphthalmic and Physiological Optics 2002; 22: 560-564
The aim of the present study was to assess the level of accuracy for measurements of intraocular pressure (IOP) obtained with a new non-contact tonometer (NCT) the Reichert AT550. Measurements were compared against those obtained with the Reichert Xpert Plus, Goldmann applanation tonometer and Perkins tonometer. Thirty-five university students were assessed with the four tonometers in a randomized order, with non-contact tonometry performed first. Each of the four measurement devices had its own trained clinical observer. Plots of differences of IOP as a function of the mean for each pair of instruments were obtained. No statistically significant differences were found when comparing the AT550 NCT with contact applanation tonometry (AT) (p > 0.05), displaying the closest level of agreement (as represented by the lowest mean difference and the narrowest confidence interval) with the Goldmann tonometer (limits of agreement, 0.12 ± 2.17). In conclusion, readings of IOP with the AT550 NCT are clinically comparable with those obtained with Goldmann tonometry in a population with IOP within the normal range.
J. Jorge, MD, Department of Physics (Optometry), School of Sciences, University of Minho, Braga, Portugal. jjorge@fisica.uminho.pt
Classification:
6.1 Intraocular pressure measurement; factors affecting IOP (Part of: 6 Clinical examination methods)
