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SA Gollance, RD Fechtner, AD Realini, E Buroff, PR D'Amato, PJ Lama, R Greene, G Thomas; Clinical Comparison of the ProviewTM Eye Pressure Monitor with Goldmann Applanation Tonometry in Healthy Eyes . Invest. Ophthalmol. Vis. Sci. 2002;43(13):1067.
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Purpose: The ProviewTM Eye Pressure Monitor (ProviewTM, Bausch& Lomb) is intended to allow patients to measure their intraocularpressure (IOP) independently. This study assesses the accuracyand reproducibility of the ProviewTM 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 ProviewTM, 5 measurementswere obtained with each of 5 different ProviewTM devices followedby Goldmann applanation tonometry (gold standard).Results:In accessing accuracy of the ProviewTM device, the mean IOPdifference between ProviewTM 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 ProviewTM device varied from 8to 30 mmHg with a mean of 13.9 mmHg and a standard deviationof 2.8 mmHg. Variance of the ProviewTM measurements is givenin the table below.Conclusion: For the range of IOPs in thispopulation, the ProviewTM 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) View OriginalDownload SlideView OriginalDownload SlideReproducibility Results (SD = square root(variance)) View OriginalDownload SlideView OriginalDownload Slide
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