Fig. 2From: Ocular biomarkers of cognitive decline based on deep-learning retinal vessel segmentationExamples of retinal vessel segmentation results, a and b are images without cognitive impairment, c and d are images with cognitive impairment. Examples of retinal vessel segmentation results. a, c Original fundus image. b, d Segmented arteries and veins: arteries shown in red, and veins in blueBack to article page