A comparison of the Cavitron Biotronics tonometer to the Goldmann tonometer

The Cavitron Biotronics tonometer operates on a principle similar to the Mackay-Marg tonometer by applanating the cornea with a probe and a 1.5 mm plunger. Measurements made with the Mackay-Marg tonometer have been shown to correlate with measurements made by other tonometers, but there are no reports of the validity or reliability of the Cavitron Biotronics tonometer. In this study, comparisons were made between intraocular pressure measurements obtained with the Cavitron Biotronics tonometer and the Goldmann tonometer. In addition, the test-retest reliability of the Cavitron Biotronics tonometer was examined.