The electroretinogram (ERG) is a diagnostic test that measures the electrical activity of the retina in response to a light stimulus. The ERG arises from currents generated directly by retinal neurons in combination with contributions from retinal glia.

The full-field ERG offers three stimulus conditions to quantitate cone function. The normal scotopic dim red flash ERG includes the bx component appearing prior to the slow, large amplitude b-wave. The bx component occurs in form and time about the same as a photopic single white flash ERG.

A Flash ERG (FERG) is a test which measures the electrical response of the eye’s light-sensitive cells (rods and cones). It also checks other cell layers in the retina. Why did my doctor order this test?

The full-field electroretinogram (ERG) is a mass electrophysiological response to diffuse flashes of light and is used widely to assess generalized retinal function. This document, from the International Society for Clinical Electrophysiology of Vision (ISCEV), presents an updated and revised ISCEV …

May 1, 2001 · The most common ERG response from a human, which is elicited with a full-field (Ganzfeld) flash of light, contains the a-wave and the b-wave as shown in Fig. 21. The amplitude of the a-wave is measured from a baseline that is monitored before the light stimulus, to the trough of the negative wave.

Read about electroretinography (ERG), an eye test where electrodes placed on the cornea measure electrical responses to light to try to detect abnormal retinal function.

Full-field electroretinography (ERG) is a visual electrophysiology test that measures the pan-retinal response by capturing the sum of responses from the entire retina when exposed to flashes of light.

The ERG is composed of electrical potentials contributed by different cell types within the retina, and the stimulus conditions (flash or pattern stimulus, whether a background light is present, and the colors of the stimulus and background) can elicit stronger response from certain components.

The resulting signal and, generally, the test are referred to as flash or full-field ERG. Sometimes this test is called also “standard ERG”, of just “ERG”, as it is the most frequently administered type of ERG test.

The flash and background wavelength for the ISCEV-standard ERG 82 are defined as visibly white, with CIE co-ordinates near x = 0.31, y = 0.32. Both white flashes 83 and chromatic (blue and green) flashes have been used to elicit long-duration ERGs of similar 84 waveform [18]. Some laboratories use orange stimuli in the presence of green background,