This positive potential behaves as if it were a single dipole oriented from the retina to the cornea.
Such corneoretinal potentials are well established and are in the range of 0.4 - 1.0 mV .
Eye movements thus produce a moving (rotating) dipole source and, accordingly, signals that are a measure of the movement may be obtained .
The chief application of the EOG is in the measurement of eye movement.