Ключевые слова: background, blue, care, chart, check, clinic, copy, correction, diagnostic, disease, doctor, examination, eye, eyeglasses, eyesight, eyewear, flat, frame, glasses, health, healthcare, hospital, illness, lay, lenses, letters, light, look, measure, medicine, object, ophthalmic, ophthalmology, optical, optician, optometry, read, see, sight, snellen, space, symbol, test, text, top, treatment, trial, view, vision, visual,