Ophthalmologists quite skeptical about such home inspections, perceiving them rather as an exciting game. They say that even with a professional table, at home to determine visual acuity can only be very roughly, because there is no opportunity to observe all the scan settings: lighting, distance, contrast characters. In addition, to determine what glasses or lenses are needed, can only be experienced ophthalmologist. Independent selection can only make the problem worse.
In addition to the test-Golovin Sivtseva to test near vision use special cards with typed text on them. It is divided into paragraphs and each paragraph typed letters different in magnitude. Plates kept at a distance of about 35 inches from the eyes.
And in order to choose the right glasses or lenses, conduct a study of refraction. Its essence is that selected for each eye lenses of various diopters. And when the patient is determined in which of them he sees better parameters are recorded in the recipe for the selection of glasses or lenses.