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 1184192394 T1 Retinal Disorders Associated with Systemic Diseases T2 Current Medical Diagnosis & Treatment 2022 YR 2022 FD 2022 PB McGraw-Hill Education PP New York, NY SN 9781264269389 LK accessmedicine.mhmedical.com/content.aspx?aid=1184192394 RD 2024/04/25 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 center involved.