Professional
Technical
In the Industry Vocabulary Test
electroretinogram
Also written as: ERG — electroretinogram
A diagnostic test measuring electrical responses of retinal cells to light stimulation.
Full Definition
An electroretinogram (ERG) is an electrophysiological test that records the electrical activity of the retina in response to light stimuli. The test involves placing electrodes on or near the eye to measure responses from photoreceptors, bipolar cells, and other retinal neurons. ERGs are used to diagnose various retinal disorders and assess visual pathway function. The test produces characteristic waveforms that reflect different stages of retinal processing, with abnormalities indicating specific types of retinal dysfunction.
Usage
Usage note: Often abbreviated as ERG in clinical documentation.
In Context
- "The electroretinogram showed markedly reduced b-wave amplitudes consistent with retinal dystrophy." — Clinical report
- "ERG testing will be performed under both photopic and scotopic conditions." — Test protocol
Also known as
ERG
Don't confuse with
electroencephalogram
electro-oculogram