4. Blurred Vision

Hyperglycemia can damage the small blood vessels of the eye. Additionally, Hyperglycemia significantly increases the risk of developing glaucoma, cataracts, and other ocular disorders. When sufficient damage has been done to the blood vessels near the retina, a severe condition known as Diabetic Retinopathy can develop. Diabetic Retinopathy is considered the leading cause of decreased vision or blindness in Americans aged 20 to 70 years. People with type 1 or type 2 diabetes are at significant risk of developing this debilitating condition.