Comparison of the ICare® rebound tonometer with the Goldmann tonometer in a normal population

2005 
This study proposes to evaluate the level of accuracy of intraocular pressure (IOP) measurements of a second generation rebound tonometer (IOPen � ), taking as references the Goldmann Applanation Tonometer (GAT) and the iCarerebound tonometer. The right eyes of 101 consecutive clinical patients were assessed with the three tonometers. The IOPenand iCaremeasurements were taken by two different optometrists and the GAT by an ophthalmologist. In this study, statistically significant differences were found when comparing the IOPentonometer with the other two tonometers (p < 0.001). The IOPenunderestimated the IOP value when compared to the GAT and the iCare � (mean differences were 2.94 ± 4.65 mmHg and 3.20 ± 4.72 mmHg (mean ± S.D.), respectively). The frequency distribution of differences demonstrated that in more than 55% of measurements the IOP readings differed by more than 3 mmHg between the IOPenand the GAT. Based on the present population study, these results suggest that IOPenmeasurements should be
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