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What causes diabetic retinopathy?

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In people with diabetes, high blood sugar damages the walls of the small blood vessels in the eye, altering their structure and function. These vessels may thicken, leak, develop clots, close off, or grow balloon-like defects called microaneurysms. Frequently, fluid accumulates in the part of the retina used in tasks such as reading; this condition is called macular edema.

SOURCE:

American Diabetes Association.

American Academy of Ophthalmology.

Reviewed by Brunilda Nazario on April 29, 2021

SOURCE:

American Diabetes Association.

American Academy of Ophthalmology.

Reviewed by Brunilda Nazario on April 29, 2021

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What causes advanced diabetic retinopathy?

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