оптика контактные линзы

SHORT-SIGHTEDNESS - (миопия) one of kinds of a clinical refraction of an eye, at a cut the parallel beams going from subjects, after their refraction in an eye incorporate in focus ahead of a mesh environment (fig. 1). On a retina at Б. the missing beams proceeding from subjects, located from an eye on close distance (fig. 2) incorporate in focus only. In this connection the remote subjects are perceived indistinctly. Distance within the limits of which probably precise sight, depends on degree Б.-the above Б., the there should be a subject closer. Подробнее...

Intravenous purpose{assignment} usually gives immediate therapeutic effect. The doze of an entered preparation can be calculated beforehand. This way of introduction is convenient for great volumes of a liquid and irritating substances. The negative party{side} of intravenous injections - the raised{increased} risk of by-effects that demands slow introduction of medical products. Intravenous introduction usually does not give increase of concentration of antibiotics in a cornea in comparison with инстилляциями and субконъюнктивальным a method. Nevertheless intravenous introduction allows to increase concentration of a preparation in the forward chamber of an eye that will warn эндофтальмит at threat of punching of a cornea. Подробнее...