Abnormal visual-evoked responses and opsoclonus.
A 73-year-old woman presented with classic opsoclonus two weeks following an acute febrile illness. Four weeks later a complete clinical recovery was evident. Six weeks after onset of the problem, or 2 weeks after resolution of the abnormal eye movements, a pattern reversal visual evoked response showed a delayed response in both eyes and had an unusually high amplitude. For the next 2 months the patient complained of occasional blurring of vision. A repeat visual evoked response test after 4 months revealed normal latency and amplitude in both eyes. The possible mechanisms for the visual evoked response abnormality are discussed.
D000368:Aged; D005074:Evoked Potentials, Visual; D005132:Eye Manifestations / Q000503:physiopathology*; D005260:Female; D006801:Humans; D009901:Optic Nerve Diseases / Q000175:diagnosis / Q000503:physiopathology; D011930:Reaction Time