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Li J, Herndon LW, Asrani SG, Stinnett S, Allingham RR. Clinical Comparison of the Proview Eye Pressure Monitor With the GoldmannApplanation Tonometer and the TonoPen. Arch Ophthalmol. 2004;122(8):1117–1121. doi:10.1001/archopht.122.8.1117
To compare intraocular pressure (IOP) values obtained by patients usingthe new Proview eye pressure monitor (Bausch & Lomb, Rochester, NY) withthose measured with the Goldmann tonometer and the TonoPen (Mentor, Norwell,Mass).
Eighty-six patients (a total of 171 eyes) with a diagnosis of glaucomaor glaucoma suspect successfully completed the study. The IOP was measuredby 3 methods in the following order: Goldmann tonometer, TonoPen, and Provieweye pressure monitor. The central corneal thickness was measured by an ultrasonicpachymeter. Separately for each eye, the differences in mean IOP values betweenmeasurement methods were assessed with paired t testsand also in multivariate models that tested the dependence of IOP differenceon central corneal thickness.
There was a significant difference (P<.001)in the mean IOPs measured by the 3 different methods (Goldmann vs Proview,Goldmann vs TonoPen, and TonoPen vs Proview) for both eyes, and the differencewas independent of the central corneal thickness. The differences betweenIOP measured by Goldmann and Proview were similar in all categories of patient-reportedease of using the Proview.
The IOPs obtained with the Proview eye pressure monitor are significantlylower than those measured with Goldmann tonometer and the TonoPen, and variationsof the central corneal thickness do not contribute to the difference. Intraclasscorrelations of IOP values obtained with the Goldmann and the Proview or TonoPenand Proview are not strong. On the other hand, as expected, measurements withGoldmann and TonoPen agreed fairly well.