Ключевые слова: accuracy, alphabet, astigmatism, background, blur, blurred, care, chart, check, concept, diagnostic, diopter, exam, examination, eye, eyeglasses, eyesight, eyewear, farsightedness, focus, frame, glass, glasses, health, healthcare, lens, looking, medical, medicine, myopia, ophthalmologist, ophthalmology, optical, optician, optometrist, optometry, read, rim, see, selective, sheet, sight, sightedness, specs, spectacles, test, text, view, vision, visual,