We studied similarities and differences in components of multifocal electroretinogram (m-ERG) and conventional ERG responses obtained from the affected eye and fellow eye of a 32-year-old female with unilateral night blindness. The results of the fundus examination and fluorescein angiography were normal. The mixed rod-cone ERG response was of a negative type in the right eye, and the amplitude scotopic ERG response in the right eye was one fourth that in the left. Responses to photopic brie-flash stimulation and 30- Hz flicker stimulation were not different between the two eyes but the response to photopic long-flash stimulation to separate the on-response and the off-response in the right eye had a larger a-wave a markedly smaller b- wave and a larger d-wave than responses from the normal left eye. The waveform of the response from the affected right eye was similar to those from the eyes of patients with congenital stationary night blindness; however there was little difference between m-ERG waveforms recorded from the affected and unaffected eyes of our patient. These results suggest that the d-wave of the photopic off-response accounts for a considerable portion of the m-ERG response as well as of the photopic brief-flash ERG response and therefore for the similarity of m-ERG and photopic brief-flash ERG responses.
|Number of pages
|Folia Ophthalmologica Japonica
|Published - 07-1997
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