Cyclic variations in the c-wave amplitude of the sheep ERG.
D000818:Animals; D003623:Dark Adaptation; D004594:Electrophysiology; D004596:Electroretinography; D010507:Periodicity; D010775:Photic Stimulation; D012160:Retina / Q000502:physiology*; D012756:Sheep / Q000502:physiology*; D013997:Time Factors