title: Variability on serial testing of visual evoked potentials in patients with multiple sclerosis.
mesh_terms: D005074:Evoked Potentials, Visual; D005500:Follow-Up Studies; D007839:Functional Laterality; D006801:Humans; D009103:Multiple Sclerosis / Q000175:diagnosis*; D010775:Photic Stimulation; D012016:Reference Values; D014792:Visual Acuity