Fig. 2
From: Relationship between retinal vessel tortuosity and oxygenation in sickle cell retinopathy
a Relationships of vascular O2 content with vessel tortuosity index (VTI) based on compiled data in NC and SCR subjects. There was no statistically significant linear relationship between O2 content and VIT considering both arteries and veins after adjusting for age and MAP. b Relationship of vascular O2 content with number of inflection points (VII) based on compiled data in NC and SCR subjects. There was a statistically significant negative linear relationship between O2 content and VII, considering both arteries and veins after adjusting for age and MAP. Data points represent measurements in retinal arteries (red dots) and veins (blue dots)