Mean difference between absolute intraindividual measurements was 2.95 μm or 1.76% for BMO-MRW, 0.02 mm
2 or 2.68% for BMO-MRA, and 1.18 μm or 1.89% for RNFL thickness. While BMO-MRW and RNFL thickness demonstrated a comparable relative change between intraday measurements (
P = 0.45), BMO-MRA showed significantly higher intraindividual variability compared with BMO-MRW (
P < 0.001) and RNFL thickness (
P = 0.008). Comparison of time points resulted in η
2 = 0.001 with
P = 0.757 for RNFL thickness, η
2 = 0.04 with
P = 0.06 for BMO-MRW, and η
2 = 0.07 with
P = 0.01 for BMO-MRA.
Figures 1 through
3 show Bland-Altman plots for graphical display of intraday repeatability of the three morphometric parameters. Intraclass correlation coefficients 95% confidence intervals (CI) were 0.994 to 0.997 for RNFL thickness (
P < 0.001), 0.999 to 1.0 for BMO-MRW (
P < 0.001), and 0.994 to 0.998 for BMO-MRA (
P < 0.001).