Ключевые слова: accuracy, adjustment, ametropia, augenoptik, business, buy, concave, contact, convex, correction, cost, disease, eye, farsightedness, fine tuning, finetuning, fit, glasses, glasses business, goggles, health, individual, insurance, invite, lens, lenses, medical, momentary, multiple, occupation, offer, ophthalmologist, ophthalmology, optician, opticians, own, payment, precision, profession, range, reading, retail, sale, scale, sehhilfe, sehtest, selection, service, share, sight, sightedness, supplementary, varifocals, weakness,