Ключевые слова: accessibility, alphabet, blind, blindness, book, braille, day, disability, disabled, education, finger, hand, handicapped, health, illness, illustrative, international, knowledge, language, learning, letter, loss, man, muscular, page, paper, people, point, problem, pupil, read, reading, relief, school, sense, sheet, sick, sight, sightless, sign, student, studying, symbol, system, text, touch, visual,