RT Book, Section A1 Duncan, Jacque L. A1 Parikh, Neeti B. A1 Seitzman, Gerami D. A2 Papadakis, Maxine A. A2 McPhee, Stephen J. A2 Rabow, Michael W. A2 McQuaid, Kenneth R. SR Print(0) ID 1193144884 T1 Retinal Disorders Associated with Systemic Diseases T2 Current Medical Diagnosis & Treatment 2023 YR 2023 FD 2023 PB McGraw-Hill Education PP New York, NY SN 9781264687343 LK accessmedicine.mhmedical.com/content.aspx?aid=1193144884 RD 2024/04/18 AB ESSENTIALS OF DIAGNOSISPresent in ~33% of all diagnosed diabetic patients.Present in ~20% of type 2 diabetic patients at time of diagnosis of diabetes.By 20 years after diagnosis of diabetes, 99% of type 1 diabetic patients and 60% of type 2 diabetic patients will have diabetic retinopathy.Nonproliferative diabetic retinopathy: can be mild, moderate, or severe. Microvascular changes are limited to the retina.Proliferative diabetic retinopathy: new blood vessels grow on the surface of the retina, optic nerve, or iris.Diabetic macular edema: central retinal swelling; can occur with any severity level of diabetic retinopathy; reduces visual acuity if the foveal center is involved.