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Simultaneous recording of visual evoked potentials and electroretinograms in patients with unilateral opaque media
Author(s) -
Mashima Yukihiko,
Matsuhashi Masakazu,
Oguchi Yoshihisa
Publication year - 1988
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.1988.tb08533.x
Subject(s) - visual evoked potentials , stimulus (psychology) , ophthalmology , optic nerve , medicine , erg , audiology , electrodiagnosis , evoked potential , opacity , psychology , optics , physics , retinal , cognitive psychology
. 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 opacties.