The ocular dipole--a damped oscillator stimulated by the speed of change in illumination.
D000042:Absorption; D003624:Darkness; D004560:Electricity; D004585:Electrooculography; D004594:Electrophysiology; D006801:Humans; D009799:Ocular Physiological Phenomena; D010775:Photic Stimulation; D013053:Spectrophotometry; D013057:Spectrum Analysis; D013696:Temperature; D013997:Time Factors