Written by an experienced clinician and researcher in the field, this reference provides practical information on the clinical recording techniques, physiologic origins, and applications of electroretinogram (ERG), electro-oculogram (EOG), and visual evoked potential (VEP) tests. It provides in-depth discussions of the electrophysiologic findings of more than 120 clinical conditions, describes classic electrophysiologic tests as well as novel and specialized recordings, discusses retinal, optic nerve, central nervous system, and systemic disorders, and thoroughly covers hereditary, degenerative, vascular, inflammatory, immune-related, infectious, toxic, and nutritional conditions.