A patient with long-standing diabetes reports new blurry vision. This symptom most strongly suggests possible development of which complication?

• A. Diabetic retinopathy
• B. Glaucoma only
• C. Macrovascular peripheral artery disease
• D. Acute kidney injury

Answer: (A)

When someone with long-standing diabetes reports new blurry vision, the most likely issue is diabetic retinopathy, a microvascular complication of hyperglycemia. Chronic high blood glucose damages the tiny blood vessels in the retina, causing leaks and blockages that lead to retinal swelling and the formation of abnormal new vessels. This process directly affects vision, especially as macular edema develops, which blurs central vision.

Glaucoma, while also a vision-threatening eye condition, results from increased intraocular pressure and optic nerve damage rather than direct damage from retinal blood vessels due to diabetes. Macrovascular peripheral artery disease involves large arteries and typically presents with leg pain or cramps during activity, not sudden vision changes. Acute kidney injury affects kidney function and does not explain blurred vision.

Because duration of diabetes and control of blood sugar are major risk factors for retinopathy, that eye complication is the classic cause of new blurry vision in this context. Regular dilated eye exams are important for early detection, and management focuses on optimizing blood glucose, blood pressure, and lipids, with specific eye treatments if retinopathy progresses.