Ключевые слова: astigmatism, background, bifocal, blind, blue, bottle, care, close, concept, contact, container, containers, cornea, correction, corrective, defect, distance, eye, eyes, eyestrain, farsightedness, flat, focus, health, hygiene, lay, lens, lenses, lifestyle, medic, medical, medicine, myopia, oculist, ophthalmologist, optician, optometry, prescription, pupil, shortsightedness, solution, top, tweezers, up, view, vision, visual, watch, wear,