A comparison Of The Diaton, ICare, And Goldmann Methods Of Tonometry.

Background: To determine if the Diaton and Icare tonometers are as accurate and reliable
as Goldmann Applanation tonometry. Methods: Intraocular pressure was measured in 140 eyes of70 participants by means ofthree methods. Additionally, the Pachmate, using ultrasound, was utilized to measure pachymetry on all eyes in the study. Measurements were taken in the order of: Goldmann, Icare, Diaton. Results: Goldmann was shown on average to measure lOP 0.49 millimeters higher than the Icare. One standard deviation of the Icare measurements was 2.38 millimeters, while two standard deviations was 4.76 millimeters. When comparing the Diaton and Goldmann, Goldmann measured lOP 1.21 millimeters higher on average. One standard deviation of measurements with the Diaton was 3.45 millimeters, while two standard deviations was 6.90 millimeters. Conclusions: We can recommend Icare as a safe alternative to Goldmann tonometry, but the same cannot be said for the Diaton. We can only recommend that the Diaton be used as a
screening device ofiOP in healthy individuals without known history of above normal lOP or glaucoma.