1st April 2022

A 24-year-old female presents with blurry vision and pain in her right eye

A 24-year-old female presents with blurry vision and pain in her right eye. There is no redness or discharge from either eye on examination. You notice that her right pupil dilates when you swing a pen torchlight from the left to the right eye. 

Which of the following is the most likely underlying diagnosis?

Select the SINGLE most appropriate option from the list below. Select ONE option only.