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Bland–Altman plots evaluating interobserver variation of fornix intercanthal distance (FICD) measurements. Bland–Altman plots showing interobserver variation in upper (A) and lower (B) FICD. Because there are no defined limits for FICD, the calculations are in millimeters. The millimeter difference in assessment between observer 1 and 2 is plotted against mean millimeter measurement for each patient and the mean ± 2 standard deviations (SDs).
