Ключевые слова: astigmatism, background, care, chart, check, clinic, correction, defect, diagnostic, different, diopter, doctor, equipment, examination, eye, eyesight, flat, frame, frontal, glasses, head, health, hospital, lay, lens, medical, medicine, mirror, myopia, object, oculist, ophthalmologist, ophthalmology, optical, optician, optometric, optometrist, optometry, poster, reflector, sight, specialist, table, test, tools, top, trial, view, vision, white,