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Course: A Man Who Cannot Elevate His Right Eye or Abduct His Left Eye

CME Credits: 1.00

Released: 2021-07-22

A 54-year-old man presented with a 3-day history of right ptosis and double vision. He was otherwise healthy and did not take any regular medications. Initially, he had horizontal diplopia on the first day that was worse at the end of the day, but this resolved when the right eyelid ptosis became complete. He denied any difficulty with his speech, swallowing, weakness, or sensory changes.
He presented to the emergency department, and the emergency department physician reported a normal neurological examination result apart from the right-sided ptosis and limited eye movements. He was referred to ophthalmology and had a visual acuity of 20/20 OU. Both pupils were equal sizes and reactive to light. He was found to only have a complete limitation of elevation of his right eye and a limitation of abduction in his left eye (). He was orthophoric in primary position, and there were no eyelid twitches. Orbicularis oculi strength was reduced on both sides. A dilated fundus examination had normal results bilaterally. An initial neurological examination, including assessments of motor strength in the upper and lower extremities and reflexes and a sensory examination, had normal results.


Educational Objective
Based on this clinical scenario and the accompanying image, understand how to arrive at a correct diagnosis.


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