Home > Specialties > Electrodes, Neurologic, Evoked Potential, Visual, Electroretinography

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

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1-4 of 4 Match(es).

Danker Laboratories Inc

Company Type: Parent

Danker Laboratories, Inc. has provided quality contact lenses to the professional eyecare community since 1958.

Diagnosys LLC

Company Type: Parent

Diagnosys LLC is the technology leader in the field of ophthalmic electrophysiology. Offering a complete range of ERG, PERG, mfERG, EOG, flash and patttern VEP stimulator options recognized for superior engineering and performance, the Diagnosys Espion suite remains the system of choice for clinical, clinical trials, and advanced research applications.

Diopsys Inc

Company Type: Parent

Diopsys, Inc. is a leading provider of non-invasive medical devices that test for visual disorders that may affect the entire visual pathway.

The Electrode Store

Company Type: Parent

The Electrode Store is a world leader in Electromyography (EMG) needle electrodes, Electroencephalography (EEG) subdermal needle electrodes, EMG reusable and disposable surface electrodes, Intraoperative Monitoring (IOM) probes, and EEG reusable and disposable surface electrodes since 1975.

1-4 of 4 Match(es).

 

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