Historical note: the vertebrate median eye.
D000663:Amphibians; D000818:Animals; D001001:Anura; D005075:Biological Evolution; D004594:Electrophysiology; D005399:Fishes; D049672:History, 19th Century; D049673:History, 20th Century; D008116:Lizards; D009043:Motor Activity; D009462:Neurology / Q000266:history; D010101:Oxygen Consumption; D010775:Photic Stimulation; D010786:Photoreceptor Cells / Q000502:physiology; D010858:Pigmentation; D010870:Pineal Gland / Q000033:anatomy & histology* / Q000502:physiology; D012104:Reptiles; D012867:Skin