Diabetic retinopathy is a complication of diabetes that affects the eyes. It damages the blood vessels in the retina and can lead to vision loss over time if not treated. People with type 1 or type 2 diabetes, especially those who have had the disease for a long time, are at higher risk. Symptoms may include blurred vision, spots in vision, and eye pain. Treatment focuses on controlling blood sugar and blood pressure as well as laser treatments or surgery in severe cases to prevent further vision loss.