Diabetic retinopathy is a condition that occurs in people who have diabetes. It can cause progressive damage to the retina, which is the inside lining of the back of the eye that is responsible for vision. Diabetic retinopathy can be a serious sight-threatening complication of diabetes if left untreated.
Over the passage of time, diabetes damages the blood vessels in the retina. Diabetic retinopathy occurs when these tiny blood vessels leak blood, fluid and other materials. This results in damage to the retinal tissue manifesting itself as reduced vision.