9th September 2020

A 25-year-old female presents with acute onset visual blurring in her right eye

A 25-year-old female presents with acute onset visual blurring in her right eye. She has never had this happen before and has no past medical or family history of migraine. On examination, the eye is dilated and unresponsive to light. It does very slowly constrict on accommodation.

For the patient above, please select the SINGLE most likely underlying cause of their pupillary abnormality. Select ONE option from the list above.