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Abstract #47856 Published in IGR 13-4
Dynamic contour tonometry and Goldmann applanation tonometry: Correlation with intracameral assessment of intraocular pressure
Riva I; Quaranta L; Russo A; Katsanos A; Rulli E; Floriani IEuropean Journal of Ophthalmology 2011; 22: 55-62
Purpose. To compare intraocular pressure (IOP) measured using a dynamic contour tonometer (DCT) and a Goldmann applanation tonometer (GAT) with in vivo intracameral IOP, and establish the relationship between DCT, GAT and central corneal thickness (CCT) in patients with primary open-angle glaucoma (POAG). materials and methods. We examined 50 eyes of 50 patients with POAG scheduled for glaucoma or cataract surgery. Immediately before surgery, CCT, GAT and DCT IOP were assessed, after which ma-nometry of the anterior chamber was performed. A Bland-Altman plot was used to test the agreement among the 3 measurements of IOP, and univariate and multivariate regression analyses were used to evaluate the effect of CCT on DCT and GAT. results. On average, the DCT readings were 4.0(plus or minus)1.6 mmHg higher than the GAT readings and 2.3(plus or minus)2.4 mmHg higher than the manometric readings; the GAT measurements were generally a mean 1.7(plus or minus)1.8 mmHg lower than the manometric readings. The CCT had an almost similar influence on DCT and GAT measurements (p=0.84). ConClusions. The DCT-measured IOP was significantly higher than that measured by means of GAT and anterior chamber manometry. The DCT and GAT readings were both influenced by CCT to the same extent. (copyright) 2011 Wichtig Editore.
L. Quaranta. Spedali Civili di Brescia, University of Brescia, Piazzale Spedali Civili 1, 25123 Brescia, Italy. Email: quaranta@med.unibs.it
Classification:
6.1.1 Devices, techniques (Part of: 6 Clinical examination methods > 6.1 Intraocular pressure measurement; factors affecting IOP)