title: The role of magnetic resonance imaging and visual evoked potential in management of optic neuritis.
abstract: BACKGROUND
  To report our experience in management of patients with optic neuritis. The effects of brain magnetic resonance imaging and visual evoked potential on management were investigated.
  
  
  METHODS
  This is a four years clinical trial that included patients presenting with first attack of optic neuritis older than 16 years with visual acuity of less than 6/60 and presentation within first week of illness. Brain magnetic resonance imaging and visual evoked potentials were done for all patients. Patients were classified into three groups. First group received placebo, second received oral steroids and third received intravenous and oral steroids. Primary outcome measure was improvement in visual acuity.
  
  
  RESULTS
  A total number of 150 patients were enrolled in the study. Ocular pain was seen 127 patients Relative afferent pupillary defect in 142 patients and color vision impairment in 131 patients. Abnormal MRI findings were seen in 84 patients. Pattern reversal VEP was abnormal in all patients. Using oral or intravenous steroid resulted in faster recovery but did not affect the final visual outcome. Recurrence rate was higher in patients with multiple MRI lesions and diminished VEP amplitude. Using intravenous steroids decreased recurrence rate in patients with three and more MRI lesions and non recordable VEP response.
  
  
  CONCLUSIONS
  MRI and pattern reversal VEP are recommended to be done in all patients presenting with optic neuritis. We advise to give intravenous methyl prednisolone in patients with multiple MRI white matter lesions and non recordable VEP at presentation.
authors.affiliation: Senior ophthalmology specialist at King Hussein Medical Center, Neuro-ophthalmology fellowship, Moorfield's Eye Hospital, London, UK.
authors.forename: Suha Mikail
authors.initials: SM
authors.lastname: Al-Eajailat
authors.affiliation: Ophthalmology specialist at King Hussein Medical Center, Neuro-ophthalmology fellowship, Addenbrooke's Hospital, Cambridge, UK.
authors.forename: Mousa Victor
authors.initials: MV
authors.lastname: Al-Madani Senior
mesh_terms: D000293:Adolescent; D000305:Adrenal Cortex Hormones / Q000627:therapeutic use; D000328:Adult; D005074:Evoked Potentials, Visual; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009902:Optic Neuritis / Q000175:diagnosis* / Q000503:physiopathology / Q000628:therapy*; D011237:Predictive Value of Tests; D012008:Recurrence; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D000305:Adrenal Cortex Hormones
keywords: Optic neuritis; recurrence; steroids; visual evoked potential