Ключевые слова: alphabet, background, bad, blind, blurry, care, chart, concept, distance, doctors, driving, equipment, exam, examination, eye, eyeglasses, eyesight, farsighted, focus, focused, glasses, good, health, healthcare, healthy, illness, lens, letters, look, magnification, measure, medical, nearsighted, optical, optics, optometrist, perfect, range, read, reading, see, sharp, sight, sign, spectacles, strain, test, view, vision, visual,