Diabetic retinopathy is a complication of diabetes and a leading cause of blindness. There are two types of diabetic retinopathy: nonproliferative and proliferative.
Nonproliferative retinopathy causes the retina to swell, leading to blurry vision. Eventually, this can progress to proliferative retinopathy, in which tiny blood vessels grow into the fluid that fills your eyeball. When these blood vessels break and bleed, it can cause severe vision loss.
Diabetic retinopathy can happen to anyone with diabetes, but it’s more common in people whose diabetes is poorly controlled.