Diabetic macular edema

In people with diabetes, too much blood sugar can damage the tiny blood vessels at the back inner wall of the eye, called the retina, or block those vessels completely. This condition is diabetic retinopathy. Tiny bulges, called microaneurysms, form in the blood vessels, leaking fluid into the retina. The fluid can cause swelling in a part of the retina called the macula. This serious eye problem is diabetic macular edema. It can cause vision problems or blindness.

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