Oscillations in the pigeon's pupil servomechanism in relation to illumination.
D000221:Adaptation, Ocular; D000818:Animals; D001717:Birds; D007498:Iris / Q000502:physiology*; D008027:Light; D009801:Oculomotor Muscles / Q000502:physiology*; D009991:Oscillometry; D011680:Pupil / Q000502:physiology*; D012018:Reflex