Mental Health Awareness Offer

Discover your mystery discount!

Electrooculography

– Principle: – Eye acts as a dipole with anterior pole positive and posterior pole negative. – Left gaze: cornea near outer canthus results in […]

« Back to Glossary Index

– Principle:
– Eye acts as a dipole with anterior pole positive and posterior pole negative.
– Left gaze: cornea near outer canthus results in negative potential difference.
– Right gaze: cornea near inner canthus results in positive potential difference.

– Ophthalmological diagnosis:
– EOG assesses pigment epithelium function.
– Dark adaptation decreases resting potential to a minimum (dark trough).
– Light adaptation causes a substantial increase in resting potential (light peak).
– Arden ratio is calculated as light peak divided by dark trough.
– Measurement similar to eye movement recordings.

– See also:
– International Society for Clinical Electrophysiology of Vision.
– Nystagmus.
– Optokinetic drum.
– Orthoptist.

– References:
– Marg, Elwin (1951): Development of electro-oculography.
– Brown, M., Marmor, M., Vaegan: ISCEV Standard for Clinical Electro-oculography (EOG) (2006).
– Bulling, A. et al.: Wearable EOG Goggles for context-awareness.
– Bulling, A. et al.: Robust Recognition of Reading Activity using EOG.
– Bulling, A. et al.: Eye Movement Analysis for Activity Recognition using EOG.

Electrooculography (Wikipedia)

Electrooculography (EOG) is a technique for measuring the corneo-retinal standing potential that exists between the front and the back of the human eye. The resulting signal is called the electrooculogram. Primary applications are in ophthalmological diagnosis and in recording eye movements. Unlike the electroretinogram, the EOG does not measure response to individual visual stimuli.[citation needed]

Electrooculography
Electrooculograms for the left eye (LEOG) and the right eye (REOG) for the period of REM sleep.
ICD-9-CM95.22
MeSHD004585

To measure eye movement, pairs of electrodes are typically placed either above and below the eye or to the left and right of the eye. If the eye moves from center position toward one of the two electrodes, this electrode "sees" the positive side of the retina and the opposite electrode "sees" the negative side of the retina. Consequently, a potential difference occurs between the electrodes. Assuming that the resting potential is constant, the recorded potential is a measure of the eye's position.

In 1951 Elwin Marg described and named electrooculogram for a technique of measuring the resting potential of the retina in the human eye.

« Back to Glossary Index
This site uses cookies to offer you a better browsing experience. By browsing this website, you agree to our use of cookies.