This document provides an overview of diabetic retinopathy. It defines diabetes and discusses the two main types. It identifies long-term complications that can affect multiple organs, including microvascular complications like retinopathy. Risk factors for retinopathy include duration of diabetes and poor blood sugar control. The pathogenesis of retinopathy involves microvascular leakage and occlusion. Retinopathy is classified as non-proliferative or proliferative, and signs and symptoms of non-proliferative retinopathy are discussed.