title: Four risk factors for severe visual loss in diabetic retinopathy. The third report from the Diabetic Retinopathy Study. The Diabetic Retinopathy Study Research Group.
abstract: The Diabetic Retinopathy Study (DRS) Research Group has so far identified four retinopathy factors that increase the two-year risk of developing severe visual loss. The risk grows as the number of risk factors increases. Eyes with three or more risk factors (eyes with "high-risk characteristics") are at a much higher risk than eyes with two or fewer factors. The DRS protocol was changed in 1976 to require consideration of treatment for these "high-risk" eyes.
mesh_terms: D003097:Collateral Circulation; D003930:Diabetic Retinopathy / Q000150:complications* / Q000473:pathology; D005123:Eye / Q000098:blood supply; D006801:Humans; D012306:Risk; D014786:Vision Disorders / Q000209:etiology*