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Fig. 2 | Eye and Vision

Fig. 2

From: Characterization of the retinal vasculature in fundus photos using the PanOptic iExaminer system

Fig. 2

Example of arteriole and venule diameter measurements. a Raw fundus photograph acquired using the Panoptic iExaminer system. b Cropped square photograph. c The measurement area was within 0.5 to 1 disc diameter of the edge of the disc margin. The arrow showed the selected parallel arteriole and venule for demonstration. d Vessel centerline was drawn along with the long vessel axis. e Five non-overlapping measurement lines for each vessel were made. f The width of each measurement line was calculated using ImageJ

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