Fig. 2
From: Reliability of retinal vessel calibre measurements using a retinal oximeter
Bland Altman plots for (a) CRVE; (b) CRAE and (d) AVR. The solid horizontal line denotes the mean difference between the two summarised vessel calibres as obtained from the red-free and the oximetry image. The two dotted lines show the ±1.96 standard deviations of the difference (denoting the upper and lower limits of agreement). Scatter plot showing the correlation of (c) CRAE (red) and CRVE (blue) between the two images