This is a videotape concerning the theory, procedure, and applications of the electroretinogram (ERG). The various cells of the retina are identified and their activities are shown on the ERG waveform. The instrumentation and electrodes necessary to perform an ERG are displayed along with their functions. Preparing the patient for the ERG is presented as well as proper placement of the reference, ground and Burian-Allen electrode. The light adapted and dark adapted ERG procedures are shown with the corresponding ERG responses. A discussion of the application of the ERG follows. Interpretation af various pathologic ERG waveforms is discussed.
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