Abstract
The detection of minor changes of visual function can be performed by means of the visual evoked response. A comparison was made between the normal eye and the affected eye of a patient suffering from optic neuritis whose visual acuity was 0.6. A red stimulus (630 nm) subtending an angle of 5° superimposed on a blue (467 nm) background of high illumination (4.0 log td) was found to be a suitable experimental condition for eliciting visual evoked responses which showed the decreased sensitivity to light of a neuritis eye relative to that of an unaffected other eye.
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