[1] Vrije Univ Amsterdam, Amsterdam Univ Med Ctr UMC, Dept Ophthalmol, Neuroophthalmol Expertise Ctr,Neurosci Amsterdam, Amsterdam, Netherlands
[2] Vrije Univ Amsterdam, Amsterdam UMC, Dept Neurol, Multiple Sclerosis Ctr, Amsterdam, Netherlands
[3] Neurosci Amsterdam, Neuroophthalmol Expertise Ctr, Amsterdam, Netherlands
[4] UCL, Inst Neurol, Natl Hosp Neurol & Neurosurg, Moorfields Eye Hosp, London, England
[5] Onze Lieve Vrouw Hosp, Dept Ophthalmol, Amsterdam, Netherlands