Ключевые слова: ability, adjust, alphabet, assist, backdrop, background, blind, blindness, braille, code, communication, computer, difficult, disability, display, education, feel, feeling, finger, hand, handicapped, hardware, help, hightech, impairment, independent, invalid, keyboard, learn, line, mark, ophthalmology, optical, palpable, pattern, person, read, sensation, signal, skill, system, technology, touch, type, vision, visionless, visual, write, writing,