Ключевые слова: aid, background, blue, blurred, care, chart, clean, clear, close, contact, correct, correction, defect, disposable, eye, eyes, eyesight, farsightedness, female, finger, focus, glasses, hand, hold, holding, lens, lense, lenses, macro, myopia, objects, one, opthalmology, optical, optician, optics, optometrist, portable, see, seeing, shown, sight, skin, snellen, test, transparent, up, vision, visual, white,