People who have type 1 or type 2 diabetes may develop a complication called diabetic retinopathy, or damage to the small blood vessels of the eye’s retina. Diabetic Macular Edema occurs when fluid from these damaged blood vessels leaks into the macula, an area in the center of the retina that helps us see objects directly ahead of us, and causes swelling.
The primary risk factor for diabetic retinopathy and eventual DME is uncontrolled blood sugar. Having high blood pressure or high cholesterol may also increase your risk of vision loss if you have DME, according to the NEI.
The primary symptom of macular edema is blurry or wavy vision near or in the center of your field of vision. Colors might also appear washed out or faded. Most people with macular edema will have symptoms that range from slightly blurry vision to noticeable vision loss.