Table 1

Vertical and horizontal cup/disc ratio measurements (VCD and HCD)

Study AStudy B
Pupil sizeUndilatedDilatedUndilatedDilated
SubjectsN=52N=34N=45N=42
VCD differences
(observer 1 − observer 2)
Mean−0.0346−0.0029−0.0044−0.0131
Range−0.6 to 0.3−0.2 to 0.1−0.3 to 0.35−0.2 to 0.1
95% limit of agreement0.31260.12280.26240.1370
F testp<0.0001p<0.0001

HCD differencesMean−0.0250−0.0176500.0107
(observer 1 − observer 2) Range−0.3 to 0.2−0.2 to 0.1−0.3 to 0.4−0.2 to 0.2
95% limit of agreement0.23480.12500.26830.1491
F testp<0.0001p=0.0002