Ключевые слова: ageing, blind, blindness, book, braille, disability, disabled, discovery, dots, education, eyesight, finger, grandfather, hand, handicapped, health, impaired, impairment, independent, knowledge, language, letter, literature, male, man, page, paper, person, point, read, reading, school, script, see, sense, sheet, sight, sightless, sign, sit, special, symbol, system, text, touch, touching, vision, visual, white, words,