Table 1. Retinopathy and maculopathy grading scheme for the English National Screening Programme for Diabetic Retinopathy.

Retinopathy (R)
R0	None	No visible retinopathy
R1	Background	Any microaneurym, haemorrhage or exudates
R2	Pre-proliferative	Venous beading, loop or reduplication Intraretinal microvascular abnormality (IRMA)Multiple deep, round or blot haemorrhages
R3	Proliferative	New vessels on the disc (NVD)New vessels elsewhere (NVE)Pre-retinal or vitreous haemorrhagePre-retinal fibrosis (with or without detachment)