Abstract
SummaryVEPs in neuro‐ophthalmology are important for diagnosis and surveillance of intracranial pathology. The VEP can indicate the impact of pathology along the afferent visual pathway to the striate cortex. The pathology may directly or indirectly affect the visual pathway. A VEP typically is largest and best defined on electrodes over the mid occiput. The VEP to pattern reversal stimulation has a main positive peak, p100. The latencyp100 has been used extensively in adult neurology to depict and monitor conduction delay consequent upon demyelination and optic neuritis associated with MS. The other characteristics of the VEP waveform are also informative including its size, shape and distribution over the occiput. An inter‐ocular comparison of the distribution of monocular VEPs over the occiput can signpost chiasmal dysfunction, e.g. compression, or chiasmal disproportion as seen in albinism or achiasmia, or indicate hemisphere dysfunction.This talk will describe what a patient experiences during a VEP, what the results look like and how they are analysed.
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