Справочник врача 21

Поиск по медицинской литературе


Synchysis scintillans




” There is no increased risk of retinal detachment. Nevertheless, prophylactic laser treatment is recommended if the other eye has previously developed a giant tear of the retina. Pavingstone degeneration. This is the term for well-demarcated areas of pigment epithelium atrophy located in the retinal periphery. There is no association with the development of a primary retinal tear. Retinoschisis. In retinoschisis there is a split in the neurosensory retina. Typical retinoschisis (splitting in the external plexiform layer) commences in the ora serrata as cystoid degeneration (Ac). In the reticular type of retinoschisis, splitting occurs in the innermost layers of the neurosensory retina. Retinoschisis is commonly bilateral and located in the lower quadrants of the retinal periphery. The incidence is 4–10 %. Holes are seen in the external layers in over 20 % of eyes with retinoschisis. In contrast, holes in the internal layers are very rare. Retinoschisis is often benign and does not require any treatment. The risk of progressive schisis detachment is 1 %. In contrast to retinal detachment, retinoschisis shows a transparent, rigid surface and does not move with ocular movements, and there are white spots within the schisis cavity on laser application. Progressive schisis detachment is treated by buckle surgery or pars plana vitrectomy. Asteroid hyalosis. In this condition there are numerous yellowish round particles in the vitreous, which move together with ocular movements (Ad). It is unilateral in 70 % and of no pathological significance. Vision is not impaired. Synchysis scintillans. This involves numerous small yellow structures in the vitreous space. The condition is often bilateral. After eye movements, the particles sink; they have no negative effect on visual acuity. [стр. 182 ⇒]