A – Background diabetic retinopathy showing microaneurysm and blot h’ge
B – Background retinopathy showing exudates
C – Maculopathy showing oedema
D – Maculopathy with exudates
E – Pre-proliferative retinopathy showing venous changes and cotton wool spots
F – Proliferative retinopathy showing neovascularization
Definition: The presence of symptoms and/or signs of peripheral nerve dysfunction in people with diabetes after the exclusion of other causes