Extreme adaptability to light, in the round pupil of the snake Spalerosophis.
D000221:Adaptation, Ocular; D000818:Animals; D002940:Circadian Rhythm; D003623:Dark Adaptation; D004106:Dilatation; D007557:Israel; D008027:Light; D011680:Pupil / Q000502:physiology*; D012621:Seasons; D012911:Snakes / Q000145:classification / Q000502:physiology*