What's causing the 'black hole' in this patient's vision?

Sara is a 33-year-old office manager who is fitted in urgently for review of sudden right-sided visual disturbance.

Test your clinical know-how by taking the quiz below. If you select the wrong answer, have another go — you can try as many times as you like!


Dr Kate Kelso is a GP and medical editor at Australian Doctor.

  1. BMC Ophthalmol 2020; 14 Sept.
  2. Am J