ProTon--a new portable tonometer. Initial experimental and clinical results
Sachs, H.; Lohmann, C.P.; Scherbauer, M.; Gabel, V.P.
Der Ophthalmologe Zeitschrift der Deutschen Ophthalmologischen Gesellschaft 92(4): 574-576
1995
ISSN/ISBN: 0941-293X PMID: 7549350 Document Number: 452569
To determine the accuracy of a new portable tonometer using the Mackay Marg principle (ProTon, Tomey) we measured three cadaver eyes in vitro and 196 eyes of 98 patients in vivo. The 325 manometric determined IOP values were compared to ProTon measurements in three enucleated, canulated human eyes. The correlation was r = 0.99. In a clinical study 196 eyes were measured with both the Goldmann and the ProTon tonometer. The results showed good correspondence with a correlation of r = 0.95. The statistical significance (paired t-test) was P < 0.001.