Feedback and the visual process.
D003213:Conditioning, Psychological; D005246:Feedback; D006801:Humans; D007858:Learning / Q000502:physiology; D009476:Neurons, Efferent / Q000502:physiology; D012160:Retina / Q000502:physiology; D011984:Sensory Receptor Cells / Q000502:physiology; D014785:Vision, Ocular / Q000502:physiology*