Ключевые слова: adult, angle, background, blind, blindness, cane, care, careful, closeup, disability, disabled, escalator, eye, eyesight, handicapped, handler, health, help, illness, impaired, indoors, legs, lifestyle, long, low, male, man, navigation, ophthalmology, orientation, person, professional, safety, sight, sightless, special, stick, unsighted, view, vision, visual, walk, walking, white,