Understanding the Impacts of Diabetic Retinopathy Causes and Risk FactorsDiabetes causes high blood sugar, or glucose, levels. Over many years, this elevated glucose can damage tiny blood vessels and nerves in the retina. The main causes of high blood sugar are type 1 and type 2 diabetes. Several risk factors can increase the chances of developing diabetic retinopathy, including:- Duration of diabetes. The longer a person has diabetes, the...