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Table 2—

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

Proposed disease severity levelFindings observable upon dilated ophthalmoscopy
No apparent retinopathy No abnormalities 
Mild NPDR Microaneurysms only 
Moderate NPDR More than just microaneurysms but less than severe NPDR 
Severe NPDR Any 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 
PDR One or more of the following: 
 Neovascularization 
 Vitreous/preretinal hemorrhage 
Proposed disease severity levelFindings observable upon dilated ophthalmoscopy
No apparent retinopathy No abnormalities 
Mild NPDR Microaneurysms only 
Moderate NPDR More than just microaneurysms but less than severe NPDR 
Severe NPDR Any 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 
PDR One or more of the following: 
 Neovascularization 
 Vitreous/preretinal hemorrhage 
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