Fig. 1
From: Gestational diabetes mellitus and retinal microvasculature
Image of SIVA grading platform. Retinal microvasculature assessment on the grading platform. A screenshot of a computer-assisted program for measurement of new geometrical retinal vascular parameters from retinal fundus photograph. Zone C is marked in SIVA software by 0.5 to 2.0 optic disc diameter away from the margin of optic disc, respectively. All retinal arterioles and venules larger than 25 µm are marked and assessed within zone C