Diabetic patients can develop diabetic retinopathy which causes progressive damage to the retina.  Diabetes is a disease that interferes with the body’s use and storage of sugar.  Diabetic retinopathy is the result of damage to the tiny blood vessels that nourish the retina.  They can become weak and leak blood which can in turn effect our vision.  The longer a person has diabetes, the more likely they will develop diabetic retinopathy.  If left untreated, diabetic retinopathy can cause blindness.