Simultaneous recording of visual evoked potentials and electroretinograms in patients with unilateral opaque media
作者:
Yukihiko Mashima,
Masakazu Matsuhashi,
Yoshihisa Oguchi,
期刊:
Acta Ophthalmologica
(WILEY Available online 1988)
卷期:
Volume 66,
issue 1
页码: 47-53
ISSN:1755-375X
年代: 1988
DOI:10.1111/j.1755-3768.1988.tb08533.x
出版商: Blackwell Publishing Ltd
关键词: visual evoked potential;electroretinogram;opaque media;visual prognosis;surgery
数据来源: WILEY
摘要:
Abstract.We studied the correlation between pre‐operative visual evoked potentials (VEPs) and postoperative visual acuities in patients with unilateral opaque media. The fellow eye was used as the control. The filtering effect due to opaque media could be assessed on the basis of the difference of the electroretinogram (ERG) threshold in the two eyes. ‘Modified VEPs’ were then calculated by eliminating the assessed filtering effects, which improved our ability to detect the potential for visual recovery. In the normal eye, the stimulus threshold for VEP is lower than that for ERG by 2 or 3 log units. Therefore should a higher stimulus threshold be found for VEP than ERG, severe optic nerve damage is highly probable in eyes with media opa
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