Ключевые слова: bad, blurred, blurry, chart, check, corrective, detail, equipment, exam, examination, eye, eyeglasses, eyesight, eyewear, focus, glasses, human, instrument, lens, letter, looking, medical, myopia, nobody, object, ophthalmologist, ophthalmology, optical, optics, optometrist, optometry, out of focus, perception, plastic, read, see, sharp, sight, snellen, spectacles, symbol, test, unsharp, view, vision, visual, white,