Ключевые слова: adult, astigmatism, background, blind, care, check, closeup, concept, doctor, equipment, exam, examination, eye, farsightedness, fitting, frame, glass, hand, health, instrument, lens, look, man, medical, medicine, myopia, ocular, ophthalmologist, ophthalmology, optical, optician, optics, optometrist, optometry, see, selection, showing, sight, sits, symbol, table, technology, test, text, treatment, various, vigilance, vision, visual, white,