title: Blind, by definition - or should we prefer functional vision?
authors.forename: Tero
authors.initials: T
authors.lastname: Kivelä
mesh_terms: D001766:Blindness / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D015354:Vision, Low / Q000175:diagnosis* / Q000503:physiopathology; D014792:Visual Acuity / Q000502:physiology*