The concept of vision.
D000293:Adolescent; D000328:Adult; D001294:Attitude to Health; D001766:Blindness / Q000503:physiopathology*; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D011639:Public Opinion; D012938:Social Perception; D013315:Stress, Psychological