The retinal response to sinusoidal variations in light intensity at very low frequency.
D000818:Animals; D001001:Anura; D003623:Dark Adaptation; D004566:Electrodes; D004585:Electrooculography; D004596:Electroretinography; D008027:Light; D008722:Methods; D010786:Photoreceptor Cells / Q000502:physiology; D012160:Retina / Q000502:physiology*