Ключевые слова: 3d, arm, black, blind, blindness, cane, care, closeup, difficulty, disability, disabled, elderly, eye, feet, glasses, guide, hand, handicapped, health, help, human, impaired, men, navigation, need, old, ophthalmology, people, person, public, rescue, road, safety, service, sight, special, stick, vision, walk, way, white stick, work, worker,