Electrodes, Neurologic, Evoked Potential, Visual, Electroretinography

Definition : Visual evoked potential electrodes designed to be placed on the cornea (i.e., at the front of the eye) to measure the transient change in the electrical potential of the retina in response to a sudden flash of light (i.e., electroretinography, ERG). Corneal electrodes typically include speculum structures used for holding the eye open and a contact lens with a wire ring (i.e., an electrode) supported by a small spring that floats on the cornea. They are gently placed on each eye with a device very similar to a contact lens inserter; an additional electrode is placed on the skin to provide a ground for the very faint electrical signals produced by the retina. The information from the corneal electrodes measuring the electrical activity of the retina in response to the flash of light is transmitted to a monitor where it is displayed. Reference skin electrodes are to be placed just above and below the eye. ERG electrodes are commonly used in procedures for evaluating both inherited (hereditary) and acquired disorders of the retina; they are also used in analysis combining electrooculography and electroretinography studies to help diagnose certain retinal diseases.

Entry Terms : "Electrodes, Retinographic" , "Retinographic Electrodes" , "Electroretinographic Electrodes" , "Electrodes, Electroretinographic"

UMDC code : 11460

U.S.companies only
Suppress Subsidiary Companies

No results at this time.


Sign Up for Free e-newsletters

Regimen and Drug Listings


Bone Cancer Regimens Drugs
Brain Cancer Regimens Drugs
Breast Cancer Regimens Drugs
Endocrine Cancer Regimens Drugs
Gastrointestinal Cancer Regimens Drugs
Genitourinary Cancer Regimens Drugs
Gynecologic Cancer Regimens Drugs
Head and Neck Cancer Regimens Drugs
Hematologic Cancer Regimens Drugs
Lung Cancer Regimens Drugs
Other Cancers Regimens
Rare Cancers Regimens
Skin Cancer Regimens Drugs
Medical Product Guide Cancer Therapy Advisor Product Zone