Melatonin and diabetic retinopathy

Diabetes is a group of metabolic diseases characterized by high blood sugar.Hyperglycemia is caused by defective insulin secretion, impaired insulin biology, or both.Long-term hyperglycemia leads to chronic damage and dysfunction of various tissues, especially eyes, kidneys, heart, blood vessels and nerves.Diabetic retinopathy (DR) is one of the most common microvascular complications of diabetes, are caused…