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Visual evoked potentials in the evaluation of “cortical blindness” in children
Author(s) -
Frank Yitzchak,
Torres Fernando
Publication year - 1979
Publication title -
annals of neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.764
H-Index - 296
eISSN - 1531-8249
pISSN - 0364-5134
DOI - 10.1002/ana.410060208
Subject(s) - cortical blindness , abnormality , blindness , audiology , visual evoked potentials , psychology , evoked potential , medicine , central nervous system , neuroscience , optometry , psychiatry
Abstract Visual evoked responses (VERs) to brief light flashes were recorded from occipital regions in a group of 30 “cortically blind” children aged 4 months to 15 years and were compared with those of 31 children of similar age range who had the same type of central nervous system diseases but without signs or symptoms of blindness. The VERs were analyzed for amplitude, number of peaks, and morphology, follwing a method used previously by other authors. All the responses had some degree of abnormality, but there were no significant differences between the two groups. The findings suggest that recording of VERs is not always an accurate method for diagnosis of cortical blindness in children since the presence of abnormal responses in not incompatible with normal vision. Only 1 patient with cortical blindness showed no response.