What is the main complication of diabetic mononeuropathy?

Diabetic mononeuropathy primarily affects specific nerves and frequently presents with symptoms such as isolated motor or sensory deficits, often in the cranial or peripheral nerves. One of the hallmark manifestations of diabetic mononeuropathy is diplopia, which occurs due to involvement of the cranial nerves controlling eye movements, particularly the third cranial nerve (oculomotor nerve). This condition can result in double vision or misalignment of the eyes.

While dizziness, foot ulcers, and peripheral arterial disease are associated with diabetes, they are not direct complications of diabetic mononeuropathy. Dizziness typically relates to other aspects of diabetic complications or medication effects. Foot ulcers are more commonly related to peripheral neuropathy and ischemia rather than isolated mononeuropathy. Peripheral arterial disease, characterized by inadequate blood flow to the limbs, is another complication of diabetes but does not stem directly from diabetic mononeuropathy. Hence, the correct answer focuses on diplopia as a significant clinical manifestation directly linked to the condition.