In this type, damaged blood vessels close off, causing the growth of new, abnormal blood vessels in the retina.
Diabetic retinopathy can progress to this more severe type, known as proliferative diabetic retinopathy. If macular edema decreases vision, treatment is required to prevent permanent vision loss.Īdvanced diabetic retinopathy. Sometimes retinal blood vessel damage leads to a buildup of fluid (edema) in the center portion (macula) of the retina. NPDR can progress from mild to severe as more blood vessels become blocked. Larger retinal vessels can begin to dilate and become irregular in diameter as well.
Tiny bulges protrude from the walls of the smaller vessels, sometimes leaking fluid and blood into the retina. When you have nonproliferative diabetic retinopathy (NPDR), the walls of the blood vessels in your retina weaken. In this more common form - called nonproliferative diabetic retinopathy (NPDR) - new blood vessels aren't growing (proliferating). There are two types of diabetic retinopathy:Įarly diabetic retinopathy. But these new blood vessels don't develop properly and can leak easily. As a result, the eye attempts to grow new blood vessels. Over time, too much sugar in your blood can lead to the blockage of the tiny blood vessels that nourish the retina, cutting off its blood supply.
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