International Clinical Diabetic Retinopathy Disease Severity Scale

Proposed Disease Severity Level

Findings Observable upon Dilated Ophthalmoscopy

No apparent retinopathy

No abnormalities

Mild nonproliferative diabetic retinopathy

Microaneurysms only

Moderate nonproliferative diabetic retinopathy

More than just microaneurysms but less than severe NPDR

Severe nonproliferative diabetic retinopathy

Any of the following:

More than 20 intraretinal hemorrhages in each of four quadrants

Definite venous beading in two or more quadrants

Prominent IRMA in one or more quadrants

And no signs of proliferative retinopathy

Proliferative diabetic retinopathy

One or both of the following:

Neovascularization

Vitreous/preretinal hemorrhage

International Clinical Diabetic Macular Edema Disease Severity Scale

Proposed Disease Severity Level

Findings Observable upon Dilated Ophthalmoscopy

Diabetic macular edema apparently absent

Diabetic macular edema apparently present

No apparent retinal thickening or hard exudates in posterior pole

Some apparent retinal thickening or hard exudates in posterior pole

If diabetic macular edema is present, it can be categorized as follows:

Proposed Disease Severity Level

Findings Observable upon Dilated Ophthalmoscopy*

Diabetic macular edema present .

Mild diabetic macular edema: Some retinal thickening or hard exudates in posterior pole but distant from the center of the macula

Moderate diabetic macular edema: Retinal thickening or hard exudates approaching the center of the macula but not involving the center

Severe diabetic macular edema: Retinal thickening or hard exudates involving the center of the macula . .