Ключевые слова: book, business, closeup, cognition, college, concept, cover, desk, education, eyeglass, eyeglasses, eyesight, glasses, goggles, knowledge, learn, learning, lens, library, lifestyle, nobody, object, open, optical, page, paper, read, reading glasses, research, school, science, spectacle, stack, still life, student, study, table, text, textbook, university,