Which is the most important next diagnostic test

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Reference no: EM133743958

Problem

A 39-year-old man with a history of migraines presents to the ED with a headache over both brows, nausea, and blurry vision for the past 6 hours. He recently started taking topiramate for his migraines. His current headache began gradually but is slightly worse than usual. The presence of blurry vision is new. He denies trauma or fever. Visual acuity is 20/200 in both eyes, and the pupils are each 4 mm and minimally reactive. The conjunctivae are injected, and the anterior chambers are clear but shallow. There is no fluorescein uptake. Fundoscopy is normal. The neurologic exam is nonfocal. Which is the most important next diagnostic test?

Reference no: EM133743958

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