retinoschisis

[ret″ĭ-nos´kĭ-sis] splitting of the retina, occurring in the nerve fiber layer (in juvenile form), or in the external plexiform layer (in adult form).

ret·i·nos·chi·sis

(ret'i-nos'ki-sis), Degenerative splitting of the retina, with cyst formation between the two layers. [retino- + G. schisis, division]

ret·i·nos·chi·sis

(ret'i-nos'ki-sis) Degenerative splitting of the retina, with cyst formation between the two layers. [retino- + G. schisis, division]

retinoschisis

Local splitting of the retina into two layers with an intervening space.

retinoschisis

A vitreoretinal degeneration characterized by splitting of the retina into two layers. It occurs either as a hereditary disease or as an acquired condition (70% of these patients are hyperopic). The X-linked hereditary condition (called juvenile retinoschisis) affects only males and usually involves the macula with loss of central vision. The congenital condition is characterized by a splitting of the nerve fibre layer from the retina whereas the acquired form, which is the most common, results in a splitting at the outer plexiform layer. The latter usually begins in the temporal periphery appearing as a coalescence of microcystoid degenerations with a smooth transparent elevation and associated with an absolute scotoma. The condition may spread to involve the entire peripheral fundus. Holes in the two layers are common and are a sign of progression. The inner layer contains blood vessels and sometimes has small whitish flakes on it, which are called 'snowflakes'.

单词	retinoschisis
释义	DictionarySeeSchesis retinoschisis retinoschisis [‚ret·ən·ō′ski·səs] (medicine) Separation with hole formation of the layers composing the retina. A congenital anomaly characterized by cleavage of the retina. retinoschisis retinoschisis [ret″ĭ-nos´kĭ-sis] splitting of the retina, occurring in the nerve fiber layer (in juvenile form), or in the external plexiform layer (in adult form). ret·i·nos·chi·sis (ret'i-nos'ki-sis), Degenerative splitting of the retina, with cyst formation between the two layers. [retino- + G. schisis, division] ret·i·nos·chi·sis (ret'i-nos'ki-sis) Degenerative splitting of the retina, with cyst formation between the two layers. [retino- + G. schisis, division] retinoschisis Local splitting of the retina into two layers with an intervening space. retinoschisis A vitreoretinal degeneration characterized by splitting of the retina into two layers. It occurs either as a hereditary disease or as an acquired condition (70% of these patients are hyperopic). The X-linked hereditary condition (called juvenile retinoschisis) affects only males and usually involves the macula with loss of central vision. The congenital condition is characterized by a splitting of the nerve fibre layer from the retina whereas the acquired form, which is the most common, results in a splitting at the outer plexiform layer. The latter usually begins in the temporal periphery appearing as a coalescence of microcystoid degenerations with a smooth transparent elevation and associated with an absolute scotoma. The condition may spread to involve the entire peripheral fundus. Holes in the two layers are common and are a sign of progression. The inner layer contains blood vessels and sometimes has small whitish flakes on it, which are called 'snowflakes'.
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