Spatial-frequency selectivity in contrast detection.
D000221:Adaptation, Ocular; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D008027:Light; D010783:Photometry; D012160:Retina / Q000502:physiology; D013028:Space Perception / Q000502:physiology*; D014792:Visual Acuity; D014794:Visual Fields