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Bland-Altman plot showing the agreement between FAZ area values obtained from manual segmentation data performed by two observers. The mean difference is 0.029 mm2 (95% CI, 0.016–0.041 mm2), indicating a slight bias of one observer to select a larger FAZ segmentation. The limits of agreement are −0.05 mm2 and 0.11 mm2. For subsequent analyses, the FAZ area value used is the average of the values obtained from the two observers.
