Sarah A Cooper1, Sara Geraldine Leddy1, Nicholas Tom Skipper2, Victoria J M Barrett3, Gordon T Plant4 1 Neurology, University Hospitals Sussex NHS Foundation Trust, Brighton, UK 2 Neuroradiology, University Hospitals Sussex NHS Foundation Trust, Brighton, UK 3 Ophthalmology, University Hospitals Sussex NHS Foundation Trust, Brighton, UK 4 University College London, London, UK Correspondence to Dr Sarah A Cooper, Neurology Department, University Hospitals Sussex NHS Foundation Trust, Brighton,...