Visual evoked responses in childhood cortical blindness after head trauma and meningitis: A longitudinal study of six cases

6 children with cortical blindness following head trauma or meningitis had visual evoked response studies initially performed shortly after the onset of blindness. On long term followup examination, 3 had evidence of visual deficit and 5 exhibited varying degrees of psychomotor retardation. Initial and followup visual evoked responses were analyzed and correlated with changes in visual and clinical status. The analyses suggest that change in short latency visual evoked response components correlates with visual ability whereas change in longer latency visual evoked response components correlates with level of psychomotor function.