Abstract
Purpose :
The purpose of the study was to compare the variation of intraocular pressure (IOP) measured with Goldmann applanation tonometry (GAT) and Icare tonometry, and if the methods were calibrated to each other.
Methods :
Totally 20 persons with normal intraocular pressure were included and evenly divided into two groups. The IOPs were measured with GAT in one group and with Icare in another group. With each method, the IOPs were measured at two occasions and at each occasion 3 measurements were performed.
Results :
The estimated variance among occasions for IOP with GAT was 7 times lower than the estimated variation with Icare. The estimated variance among measurements was 3 times lower with GAT than with Icare. The 95 % confidence intervals for each method’s mean IOPs were 11.9±1.0 mmHg for GAT and 14.2±1.4 mmHg for Icare.
Conclusions :
The variation among both measurements and occasions is smaller with GAT than with Icare, and therefore the reliability is different between the two methods. The methods are not calibrated to each other.
This is a 2021 ARVO Annual Meeting abstract.