1st grader 2nd grader Mean Difference (LoA) ICC (95% CI) Cirrus  SL-AOD (μm) 623±271 613±285 10 (-202/223) 0.927 (0.896-0.949) RTVue SL-AOD (μm) 611±267 593±260 17 (-169/203) 0.936 (0.909-0.956) Cirrus  SL-TISA (mm2) 0.221±0.106 0.219±0.111 0.002 (-0.0092/0.097) 0.905 (0.865-0.933) RTVue SL-TISA (mm2) 0.215±0.112 0.210±0.105 0.005 (-0.102/0.112) 0.877 (0.826-0.913)

Table 3: Inter-observer reproducibility with the Cirrus SD-OCT and the RTVue SD-OCT. Data are presented as mean ± standard deviation. (SL: Schwalbe’s Line, AOD: Angle Opening Distance, TISA: Trabecular-Iris-Space Area, ICC: Intraclass Correlation Coefficient, LoA: Limits of Agreement, CI: Confidence Interval).