Ключевые слова: alone, asphalt, assist, blind, cane, careful, city, closeup, crossing, crosswalk, danger, difficulty, disabled, eye, eyesight, feet, female, guidance, handicap, health, help, impaired, lane, legs, line, long, motion, navigation, ophthalmology, opthalmology, orientation, outdoors, pedestrian, road, roadway, safety, sight, stick, street, traffic, travel, urban, vision, visual, walk, white, woman, yellow, zebra,