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Effect of induced fixation disparity by negative lenses on the visually evoked potential wave
Author(s) -
HeravianShandiz J.,
Douthwaite W. A.,
Jenkins T. C. A.
Publication year - 1993
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.1993.tb00472.x
Subject(s) - monocular , fixation (population genetics) , optics , amplitude , evoked potential , binocular vision , physics , audiology , chemistry , medicine , biochemistry , gene
The effect of induced fixation disparity produced by negative lenses and base‐in prisms on the pattern visually evoked potential (VEP) was investigated. Monocular and binocular pattern reversal VEP were recorded through the negative lenses and base‐in prisms using a 9.5 min arc check size. The results suggest that the mean binocular amplitude was 27% larger than the mean monocular amplitude which indicates partial summation in the absence of negative lenses or base‐in prisms. A reduction of the binocular VHP amplitude appears to arise in the presence of fixation disparity induced by both the negative lenses and base‐in prisms. Both the prisms and the negative lenses had no appreciable effect on the monocular VEP amplitude.