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Diabetic Retinopathy
Causes and Risk Factors
How Vision Loss
Occurs
Blood vessels damaged from diabetic retinopathy can cause vision
loss in two ways.
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Fragile, abnormal blood vessels can develop and leak blood into the
center of the eye, blurring vision. This is proliferative
retinopathy and is the fourth and most advanced stage of the
disease.
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Fluid can leak into the center of the macula, the part of the eye
where sharp, straight-ahead vision occurs. The fluid makes the
macula swell, blurring vision. This condition is called macular
edema.
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