Строма радужной оболочки

Строма радужной оболочки
лат. stroma iridis
Верхняя половина сагиттальной секции передней части глазного яблока. («Строма радужной оболочки» помечена внизу справа.)
Верхняя половина сагиттальной секции передней части глазного яблока. («Строма радужной оболочки» помечена внизу справа.)
Каталоги

Строма радужной оболочки  — сосудисто-волокнистый слой ткани. Это верхний слой из двух в радужной оболочке.

Структура

Строма — тонкое сплетение волокон. Некоторые описывают окружности в радужной оболочке а большинство радиально направлено к зрачку. Кровеносные сосуды и нервы разнообразят эту сетку.

В темных глазах, строма часто содержит пигментные гранулы. Голубым глазам и глазам альбиносов, однако, не хватает пигмента.

Строма соединяется со сфинктером мышцы (сфинктером зрачка), который стягивает зрачок в круг, и набором расширительных мышц (дилататор зрачка), которые тянут диафрагму в радиальном направлении, чтобы увеличить зрачок, образуя складки. Задняя поверхность покрыта обычно, сильно пигментированным эпителиальным слоем, толщиной в две клетки (пигментный эпителий радужной оболочки), а передняя поверхность не имеет эпителия. Эта передняя поверхность предназначена для расширительных мышц.

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