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Survey Г. begin for about a century. Then examine конъюнктиву Г., turning out top and a lower eyelid. At day time illumination it is possible to find out only the expressed changes of a cornea, the forward chamber, an iris of the eye and forward departments of a crystalline lens. More thin changes Г. can be defined{determined} in a dark room at research by a method so-called lateral, or focal, illumination. A desk lamp place to the left of the patient and a little ahead of him{it}. In the right hand take a strong collective lens and hold her{it} so that focus of collected beams was on G.Cherez's researched site other magnifier which hold in the left hand, examine G.Issledovanie of an eye bottom is carried out by the doctor - expert by means of a special eye mirror - офтальмоскопа. At inspection Г. definition of intraocular pressure (тонометрия) is made Подробнее...

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...