ISSN: 1300-0365
Dil: Türkçe
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ORIGINAL RESEARCH ARTICLES |
Comparison Of Dynamic Contour Tonometry And Non-contact Tonometry In Ocular Hypertension And Primer Open Angle Glaucoma
Dr. Mesut ERDURMUŞ,a Dr. Yüksel TOTAN,a Dr. Ramazan YAĞCI,a Dr. Bahri AYDIN,a Dr. İbrahim F. HEPŞENa
aGöz Hastalıkları AD, Fatih Üniversitesi Tıp Fakültesi, ANKARA
Objective: To assess the agreement in the measurement of intraocular pressure (IOP) obtained by dynamic contour tonometer (DCT) and non-contact tonometer (NCT) in patients with primary open angle glaucoma (POAG) and ocular hypertension (OHT), and to investigate the effect of central corneal thickness (CCT) on IOP measurements for both instruments.
Material and Methods: NCT and DCT measurements were made on 104 eyes of 104 patients with POAG (n= 75) or OHT (n= 29) and agreement was assessed by means of Bland-Altman plots. The effect of CCT on NCT and DCT was assessed by linear regression analysis.
Results: The mean IOP difference between NCT and DCT was -0.80 ± 2.98 mm Hg (p= 0.009). The results demonstrated no agreement between NCT and DCT measurements. The IOP readings obtained by NCT depended on CCT (p< 0.001; r2= 0.301; a slope of 0.054 mm Hg per one µm CCT). However, DCT readings showed no effect of CCT (p= 0.388; r2=-0.002).
Conclusion: In subjects with POAG and OHT, IOP measurements with NCT and DCT are not interchangeable. DCT may be more useful in this subjects because it did not depend on CCT.Keywords: Tonometry, ocular; glaucoma, open-angle; ocular hypertension; corneaTurkiye Klinikleri J Ophthalmol 2007, 16:108-113
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