1 From the Department of Ophthalmology (A.-C.C.), Centre Hospitalier, University of Liege, Belgium; Department of Neuro-ophthalmology (G.T.P.), National Hospital for Neurology and Neurosurgery, London; and Department of Clinical and Motor Neurosciences (D.K.), University College London, UK.
2 From the Department of Ophthalmology (A.-C.C.), Centre Hospitalier, University of Liege, Belgium; Department of Neuro-ophthalmology (G.T.P.), National Hospital for Neurology and Neurosurgery, London; and Department of Clinical and Motor Neurosciences (D.K.), University College London, UK. d.kaski@ucl.ac.uk.