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来自维基百科,自由的百科全书
葡萄膜(Uvea)又稱眼球血管膜(vascular tunic)、色素膜,是眼球壁的中間層(外層為纖維膜,內層為神經膜),此膜像紫黑色、又圓又軟的葡萄而得名,由疏鬆結締組織構成,富含血管和色素,故也叫血管膜或色素膜。它由前部的虹膜、中部的睫狀體和後部的脈絡膜構成。其主要作用為產生房水、調節眼內壓、供給眼球血液營養、排泄廢物及有毒物質和遮擋光線作用。
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