Retinal vascular calibre measurement and Retinopathy.

<p>Retinal arteriolar and venular calibers were summarized as central retinal arteriolar (CRAE) and the central retinal venular (CRVE) equivalent respectively from retinal fundus photograph using the Interactive Vessel Analysis software (IVAN, University of Wisconsin, US). Arterioles are in red and venules are in blue. Retinopathy was considered present if any characteristic lesion (microaneurysms, haemorrhages, cotton wool spots, intraretinal microvascular abnormalities, hard exudates, venous beading and new vessels) was present. [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0118076#pone.0118076.ref030" target="_blank">30</a>]