Mild NPDR
At least one microaneurism
Criteria not met for other level of retinopathy
Moderate NPDR
Hemorrhage/microaneurism>= standard photograph
OR
Soft exudates(cotton wool spots),Venus beading and intraretinal microvascuar abnormality definitely present
Criteria not met for sever NPDR or very sever NPDR or PDR
Sever NPDR
Hemorrhage/microaneurism>= standard photograph in all 4 quadrants
Or Venus beading in at least  two quadrants
Or Intraretinal microvascular abnormality >=standard photograph in at least one quadrant
Table 1: Classification of non-proliferative diabetic retinopathy according to the severity.