Table 2—

International Clinical Diabetic Retinopathy Disease Severity Scale (ref. 63)

Proposed disease severity levelFindings observable upon dilated ophthalmoscopy
No apparent retinopathyNo abnormalities
Mild NPDRMicroaneurysms only
Moderate NPDRMore than just microaneurysms but less than severe NPDR
Severe NPDRAny of the following:
>20 intraretinal hemorrhages in each of 4 quadrants
Definite venous beading in 2+ quadrants
Prominent intraretinal microvascular abnormalities in 1+ quadrant
And no signs of proliferative retinopathy
PDROne or more of the following:
Neovascularization
Vitreous/preretinal hemorrhage