Table 1

Diabetic retinopathy classification

Non-proliferativeRetinal microaneurysms
Occasional blot haemorrhages
Hard exudates
Pre-proliferativeVenous beading
Large retinal blot haemorrhages
Cotton wool spots
Multiple intraretinal microvascular abnormalities
Macular oedemaRetinal thickening within 2 disc diameters of centre of macula
Adjacent hard exudates if associated with retinal thickening
ProliferativeNeovascularisation of the disc greater than 1/4 to 1/3 disc area
Vitreous or preretinal haemorrhage associated with neovascularisation
Neovascularisation of the retina 1/2 of disc area or more in size