Diabetes can affect your eyesight. If you suffer from diabetes mellitus, your body does not use, nor store sugar in the blood in an appropriated manner and the high level of sugar in the blood can damage the blood vessel in the retina. There are two types of diabetic retinopathy: nonproliferative diabetic retinopathy (NPDR) and proliferate diabetic retinopathy (PDR). A medical examination is the only way to detect changes inside your eye and to diagnose and treat retinopathy before a problem is detected in your vision.
The best treatment is to prevent the development of retinopathy as much as possible with a strict control of your blood sugar.