Clinical Comparison of the ProviewTM Eye Pressure Monitor with Goldmann Applanation Tonometry in Healthy Eyes

Abstract

Abstract: : Purpose: The Proview^TM Eye Pressure Monitor (Proview^TM, Bausch& Lomb) is intended to allow patients to measure their intraocularpressure (IOP) independently. This study assesses the accuracyand reproducibility of the Proview^TM as compared to Goldmannapplanation tonometry.Methods: Prospective clinical trial.Measurements were acquired from one randomly selected eye from32 normal subjects. In order to assess intra- and inter-devicereproducibility and accuracy of the Proview^TM, 5 measurementswere obtained with each of 5 different Proview^TM devices followedby Goldmann applanation tonometry (gold standard).Results:In accessing accuracy of the Proview^TM device, the mean IOPdifference between Proview^TM and Goldmann tonometry measurementswas +0.5 mmHg with a standard deviation of 3.1 mmHg (range -5to +16). The total discrepancy expressed as root mean squareerror (RMSE) was 3.1 mmHg. In accessing reproducibility, the800 IOP measurements with the Proview^TM device varied from 8to 30 mmHg with a mean of 13.9 mmHg and a standard deviationof 2.8 mmHg. Variance of the Proview^TM measurements is givenin the table below.Conclusion: For the range of IOPs in thispopulation, the Proview^TM tonometer was, on average, reproducibleand accurate. Multiple measurements are advisable. It is unclearwhether this device will be useful for detecting small changesin IOP within a normal range, but may be useful for detectinglarger changes. Accuracy Results (diff = device - gold standard(GS) difference)  

Reproducibility Results (SD = square root(variance))  

Keywords: 444 intraocular pressure • 356 clinical (human) or epidemiologic studies: systems/equipment/techniques