близорукость и её профилактика

Most внутрення an environment of an eyeball - the retina will consist from высокодифференцироьанных nervous elements. Микроскопически in it{her} distinguish 10 layers. The most external layer is световоспрннпмающим, it{he} is inverted to a vascular environment and will consist from нейроэпителиальных cells{cages} - sticks and колбочек, perceiving light and colors. The following layers are formed by cells{cages} conducting nervous irritation and nervous fibres. Nervous fibres form an optic nerve. Area most выесокого sight in a retina is the so-called yellow stain with central ямкой, containing only колбочки. Подробнее...

Anesthetics apply in eye practice at removal{distance} of alien bodies and various operative interventions, at measurement of intraocular pressure. The strongest local anesthetizing action possesses дикаин - 0,5-1 % a solution. Anesthesia comes through 2-3 mines and proceeds within 10 minutes. At some persons the raised{increased} sensitivity a preparation is marked. Use also новокаин - 1 %, 2 %, 5 % solutions; тримекаин - 1-3 % solutions. Подробнее...