Visual perception Optics 7 Crystals 6 Light 6 Psychology 6 Scattering 6 Sound 6 Visual communication 5 Art 4 Art and society 3 Advertising 2 Aesthetics 2 Art, Indic 2 Cognition 2 Color vision 2 Culture 2 Imagination 2 Perception 2 Social aspects 2 Space perception 2 Tourism 2 Visual sociology 2 Art-Psychology 1 Arts 1 Attention 1 Behavior 1 Cognitive psychology 1 Color blindness 1 Communication and culture 1 Communication in architectural design 1