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Visual Evoked Potentials and Electroretinograms 

Visual Evoked Potentials and Electroretinograms
Chapter:
Visual Evoked Potentials and Electroretinograms
Author(s):

Gastone G. Celesia

, and Neal S. Peachey

DOI:
10.1093/med/9780190228484.003.0041
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date: 21 October 2019

Electrophysiological testing of vision permits the objective assessment of the function of the retina, visual pathways, and cortices. This chapter covers visual evoked potentials (VEPs) and electroretinography (ERG). Flash ERG is useful in evaluating the outer retinal function and specifically helping in the diagnosis of retinal degeneration, monitoring the progress of retinal diseases, monitoring the retinal toxicity of drugs, and understanding the pathophysiology of retinal disorders. VEPs to various stimuli are useful in evaluating macular disorders, diagnosing optic neuropathies, detecting silent pathologies in the absence of other clinical signs of visual impairment, and evaluating disturbances of visual processing in degenerative diseases of the central nervous system. Simultaneous recording of pattern ERG and pattern VEP permits the differentiation between maculopathies and optic neuropathy.

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