A Comparison of Central Corneal Thicknesses Measured with Two Different Methods in Cases of Primary Open-Angle Glaucoma.

Accurate and repeatable measurement of the central cornea thickness (CCT) is important in terms of follow-up of glaucoma patients. The aim of this study was to compare CCT measurements made with an ultrasonic pachymeter (USP) and with the Spectralis Anterior Segment Module optical coherence tomography (OCT) device. The study included 52 eyes of 26 primary open-angle glaucoma patients. CCT measurements were taken with the USP device and then with the OCT by imaging cornea slices. The mean CCT was measured as 555.71 ± 47.76 μm with USP and 569.46 ± 49.5 μm with OCT. Despite the differences between the measurements of the two methods, a very strong degree of consistency was seen between the CCT measurement with USP and OCT (ICC = 0.93, p < 0.001).