Ключевые слова: amblyopia, astigmatism, bad, blurred, closeup, correction, cube, defect, diagnosis, diopters, disease, eye, eyeball, eyesight, focus, health, healthy, hyperopia, letter, looking, medical, medicine, myopia, nearsighted, nearsightedness, ophthalmology, optic, optical, optometrist, optometry, problem, read, see, shortsighted, sight, spectacles, test, view, vision,