The refractive state of the pigeon eye.
D000818:Animals; D010856:Columbidae / Q000502:physiology*; D004594:Electrophysiology; D004596:Electroretinography; D005123:Eye / Q000033:anatomy & histology; D007909:Lenses; D009799:Ocular Physiological Phenomena; D012029:Refraction, Ocular; D012160:Retina / Q000502:physiology