контактные линзы фокус

On a stage of process allocate initial, advanced, it is far зашедшую, almost absolute and absolute G.Pri initial Г. visual acuity and a field of vision are not changed. Advanced Г. it is characterized by narrowing of a field of vision on 15-20 °; at far зашедшей Г. there is more significant narrowing a field of vision usually with носовой the parties{sides}. Almost absolute Г. it is characterized by the lowered sight, and it is kept only from the temporal party{side}, at absolute Г. is absent even светоощущение. Deterioration of visual functions at Г. is connected with атрофическнми changes in an optic nerve. Подробнее...

Склера, consisting of dense collagenic fibres, it is opaque, poor blood vessels. The forward part склеры is covered конъюнктивой. On border of connection склеры with a transparent cornea is present superficial желобок in the width ок. 1 mm, so-called лимб. A cornea - transparent бессосудистое formation{education}, in the optical attitude{relation} working similarly to strong convex glass. She{it} possesses very high sensitivity a plenty of the nervous terminations{endings} located basically in its{her} superficial layers. Подробнее...