This is the earliest stage of retinopathy and vision is usually normal except in some cases. Small swellings known as micro-aneurysms or flame-shaped hemorrhages start to develop in the fundus quadrants
Moderate NPDR
There will be micro-aneurysms or hemorrhages of greater severity in one to three quadrants and leakage might occur, resulting cotton wool spots and exudates and so fourth to be present in the retina
Severe NPDR
Any of the following: (i) Severe (more than 20) hemorrhages and MAs in all four quadrants of the fundus (ii) Definite venous beading in at least two quadrants (iii) Severe damage to the small blood vessels in at least one quadrant but no signs of any PDR
PDR
One or more of the following: Neovascularization Vitreous/preretinal hemorrhage