The electro-oculogram (EOG) may be defined as a record of eye movement based on the detection of the D. C. potential of the eye and subsequent electronic magnification. Depending upon whether a D. C. or a capacitance-coupled amplifier is employed, the amplitude of the EOG will be subject to different interpretation. With a D. C. amplifier, for instance, the amplitude of the EOG will bear a relationship to the angle of ocular rotation. However, regardless of the type of instrument used, it is evident that the resultant EOG must also be a function of the magnitude of the resting potential of the eye. Experimental procedures which alter the eye potential can be expected to affect the EOG accordingly. Although several papers * relate their results to the D. C. potential of the eye, the relationship is indirect, inasmuch as EOG's rather than eye potentials were recorded.
Significant changes of the D.
ASERINSKY E. Effects of Illumination and Sleep upon Amplitude of Electro-Oculogram. AMA Arch Ophthalmol. 1955;53(4):542-546. doi:10.1001/archopht.1955.00930010550013