Ключевые слова: calibrating, care, clinic, correction, corrective, device, diagnosis, diopter, equipment, examination, eye, eyeglasses, focus, glasses, health, healthcare, instrument, lens, machine, man, measure, measurement, medical, medicine, microscope, ophthalmologist, ophthalmology, optic, optical, optician, optometrist, optometry, patient, phoropter, sight, spectacles, test, treatment, vision, visual, woman, young,