title: The function of contour in metacontrast.
mesh_terms: D000221:Adaptation, Ocular; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D010783:Photometry; D013997:Time Factors