Fig 1 Summary of study design. Vision assessments include measurement of papilloedema by ultrasonographic evaluation of optic disc elevation and nerve sheath diameter as well as optical coherence tomography measurement of retinal nerve fibre layer, LogMAR visual acuity, Humphrey visual field 24-2 mean deviation, Pelli-Robson contrast sensitivity, and Farnsworth-Munsell 100 hue colour assessment. Symptoms evaluated include headache, tinnitus, visual loss, obscurations and diplopia. Lumbar puncture was carried out only at baseline, three and six months