Scotopic threshold response in complete and incomplete types of congenital stationary night blindness

Y. Miyake, M. Horiguchi, M. Kondo, H. Terasaki

研究成果: ジャーナルへの寄稿学術論文査読

抄録

To study function of the rod visual pathway in eyes with complete and incomplete types of congenital stationary night blindness (CSNB), with special reference to the scotopic threshold response (STR) of electroretinograms (ERGs). ERGs were recorded from two patients with complete CSNB, four patients with incomplete CSNB, and four normal subjects. Full-field stimuli were used, with light intensities ranging from near absolute threshold to bright. Neither the rod b-wave nor the STR could be recorded from patients with complete CSNB. In contrast, a clear STR was recorded from patients with incomplete CSNB, although the absolute threshold of the response was elevated in proportion to elevation in the psychophysical absolute threshold. The b-wave stimulus threshold was not elevated, and the b-wave amplitude near threshold was normal in those with partial CSNB. STR latency was increased by approximately 80 msec in these patients, but b-wave latency was normal. Differences in the STRs of those with complete versus incomplete CSNB indicate that the rod system abnormality that characterized complete CSNB in different from the abnormality in incomplete CSNB. Furthermore, the greatly increased latency of the STR peak in patients with incomplete CSNB led to an abnormal relationship between the b-wave and the STR in these patients.

本文言語英語
ページ(範囲)558
ページ数1
ジャーナルFolia Ophthalmologica Japonica
46
5
出版ステータス出版済み - 1995
外部発表はい

All Science Journal Classification (ASJC) codes

  • 眼科学

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