https://www.selleckchem.com/
Mann-Whitney U tests were used to compare graders' performance. Expert graders used a more systematic approach when grading images, considered all four images per patient and used available software tools such as red-free filters prior to making a decision on management. The most challenging features for novice graders were intra-retinal microvascular abnormalities and new vessels, which were more accurately identified by experts. Taking more time to grade fundus images and adopting a protocol-driven "checklist" approach may help novice graders to function