A 68-Year-Old Man Comes to the Physician Because of Double

A 68-year-old man comes to the physician because of double vision and unilateral right eye pain that began this morning. He has hypertension, and type 2 diabetes mellitus. The patient has smoked two packs of cigarettes daily for 40 years. His current medications include lisinopril, metformin, and insulin with meals. Physical examination shows right-sided ptosis and abducted. He can only minimally adduct the right eye. An MRI of the head shows no abnormalities. His fingerstick blood glucose concentration is 325 mg/dL. This patient's condition is most likely due to which of the following etiologies?

A) Nerve compression
B) Nerve inflammation
C) Nerve ischemia
D) Lacunar stroke
E) Muscle infiltration

Correct Answer:

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