1. Oculography in which electrodes placed on the skin adjacent to the eyes measure changes in standing potential between the front and back of the eyeball as the eyes move.
2. A sensitive electrical test for detection of retinal pigment epithelium dysfunction.
3. The study and interpretation of electroencephalograms made by moving the eyes a constant distance between two fixed points.
4. The recording and interpretation of the voltages which go with eye movements.

Eye-position voltages from electrodes placed on the skin near the eye are amplified and applied to a strip-chart recorder.