Diabetes is a lifelong condition that makes people unable to produce sufficient insulin, leading to problems controlling blood sugar levels. The condition can cause a complication called diabetic retinopathy. High blood sugar levels can damage the blood vessels in the eye. This reaction is more likely to occur if the person also has high blood pressure. Diabetic retinopathy can cause floaters, blurred vision, and complete vision loss. Some people may also experience black spots in their vision. The condition is often treatable if caught early.

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