Table 2 International Clinical Diabetic Retinopathy Disease Severity Scale, American Academy of Ophtalmology
From: Serum erythropoietin concentration and its correlation with stage of diabetic retinopathy
Proposed Disease Severity Level | Finding Observable upon Dilated Ophtalmoscopy | |
|---|---|---|
DM, without DR | No abnormalities | |
Non-proliferative DR | Mild | Microaneurysms only |
Moderate | Microaneurysms, exudate, venous beading, IRMA | |
Severe | More than 20 intraretinal hemorrhages in each of 4 quadrants, definite venous beading in 2+ quadrants, prominent IRMA and 1+ quadrant; and no signs of proliferative retinopathy (4:2:1 rule) | |
Proliferative DR | Mild | Neovascularization Vitreous/preretinal hemorrhage |
Moderate | ||
Severe - High-risk - Advanced | ||