Diabetic retinopathy is the most common eye disease affecting people diagnosed with diabetes mellitus and a leading cause of blindness in adults. The term “diabetic retinopathy” refers to a variety of disorders characterized by changes in the eye’s innermost lining of light-sensitive cells we call the retina that can occur in people diagnosed with diabetes. Diabetic eye diseases cause damage to the retina through swelling, fluid leaks, or abnormal growth of blood vessels, resulting in severe vision loss or blindness. Usually affecting both eyes, diabetic retinopathy may not be noticeable for some time, developing so gradually that serious retinal damage may take place before any changes in vision are noticed.