advertisement
Abstract #10372 Published in IGR 6-1
Clinical performance of non-contact tonometry by Reichert AT550 in glaucomatous patients
Jorge J; Gonzalez-Meijome JM; Diaz-Rey JA; Almeida JB; Ribeiro P; Parafita MAOphthalmic and Physiological Optics 2003; 23: 503-506
Measuring intraocular pressure (IOP) by non-contact tonometry (NCT) has been demonstrated to be a valid and reliable technique for use in primary eye care; it is easier to use, does not transmit infectious diseases, and it is not necessary to use anaesthetic or staining eye drops. Recently, a new NCT device showed an excellent level of agreement with Goldmann tonometry, but there are no records of its performance in glaucomatous eyes. To rectify this, IOP was measured in 22 patients (44 eyes) receiving medical treatment to control elevated IOP, with AT550 and Goldmann tonometry. Mean values of IOP were 18.98 ± 2.77 and 19.08 ± 3.02 mmHg using Goldmann and AT550, respectively. Plots of differences against means displayed good agreement (mean difference ± limits of agreement, -0.09 ± 3.30); this value was not significantly different from zero (t test for dependent samples, p = 0.709). In conclusion, IOP values as measured with the AT550 NCT are clinically comparable with those obtained with Goldmann tonometry in glaucomatous patients. This validates NCT not only for screening of IOP, but also for following up glaucomatous patients with a rapid, non-invasive method.
Dr. J. Jorge, Department of Physics (Optometry), School of Sciences, University of Minho, Braga, Portugal. jjorge@fisica.uminho.pt
Classification:
6.3 Biomicroscopy (slitlamp) (Part of: 6 Clinical examination methods)
