Ключевые слова: alphabet, astigmatism, background, chart, check, checking, clinic, consultation, correction, diagnosis, diagnostic, different, diopter, doctor, equipment, examination, eye, eyeglasses, eyesight, eyewear, focus, frame, glasses, glaucoma, health, hospital, instruments, lens, medical, medicine, myopia, object, oculist, ophthalmologist, ophthalmology, optical, optician, optometric, optometrist, optometry,