Abstract: Diabetes mellitus is a series of chronic metabolic disorders due to the pancreas does not produce enough insulin resulting from defects in insulin secretion, insulin action, or both leading to the increase of glucose concentration in blood. Diabetic retinopathy is a retinal disorder found in diabetic patients. It is a cause of blindness found throughout the world. As diabetes increases and glycemic control worsens, these diabetic patients have a decrease in contrast sensitivity. Clinically, it can be used as a tool in assessing retinal function in diabetic patients. Contrast sensitivity test has a strong indication and is a prediction of a real picture of vision that affects the quality of life of someone.