Ключевые слова: accessories, astigmatism, care, checkup, clinic, diagnosis, diopter, disease, equipment, exam, examination, eye, eyeglasses, eyesight, focus, frame, glasses, health, instrument, lens, lenses, measure, measurement, medicine, oculist, ophthalmic, ophthalmologist, ophthalmology, optic, optical, optician, optometrist, optometry, patient, professional, science, set, sight, sights, technology, test, trial, vision,