Fig. 5
From: A novel method of quantifying retinal vascular tortuosity in retinopathy of prematurity
Threshold values for determining abnormal retinal vessel tortuosity in each regions of interest. The vertical axis represents the threshold tortuosity (degrees) distinguishing Normal and Abnormal groups, while the horizontal axis indicates the multiplier defining the diameter of the circular region of interest. Data at multiplier 20 were insufficient for analysis due to insufficient peripheral vessel image resolution.
