25th June 2023

A 40-year-old lady with a BMI of 40 presents with a 1-week history of headache and blurred vision

A 40-year-old lady with a BMI of 40 presents with a 1-week history of headache and blurred vision. Her only medication is the combined oral contraceptive pill. She has been to her optician, who has urgently referred her to the Ambulatory Care Medical Unit, having discovered bilateral Grade 3 papilloedema.

In addition to optic nerve dysfunction, which cranial nerve dysfunction is most likely to be present?