Fig. 1From: Assessment of retinal vascular oxygenation and morphology at stages of diabetic retinopathy in African AmericansExample of a retinal image at 532 nm in a non-diabetic subject. (a) Oxygen saturation measurements in retinal arteries and veins are displayed in pseudo color. Color bar represents hemoglobin oxygen saturation in units of percent. (b) Retinal vessel centerlines (red lines) used for tortuosity measurements are overlaid on the retinal imageBack to article page