30th April 2024

A 32-year-old woman presents with a sudden loss of vision in her right eye over the past 2 days.

A 32-year-old woman presents with a sudden loss of vision in her right eye over the past 2 days. She reports pain on eye movement and describes the vision loss as a dark shadow over a portion of her visual field. She has a history of tingling sensations in her arms and legs. There is no significant past medical or family history.

Which investigation is most likely to confirm the diagnosis?