The eye, the brain and the camera.
Garfield
J
J
D001921:Brain / Q000502:physiology*; D001931:Brain Mapping; D006801:Humans; D009799:Ocular Physiological Phenomena; D010781:Photography / Q000295:instrumentation*; D014785:Vision, Ocular / Q000502:physiology*; D014793:Visual Cortex / Q000502:physiology; D014795:Visual Pathways / Q000502:physiology; D014796:Visual Perception / Q000502:physiology