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在穿孔性眼外伤及内眼手术后,结膜上皮细胞和角膜上皮细胞可侵入眼内并增殖,即谓眼内上皮增殖(epithelial downgrowth, epithelial ingrowth)。白内障手术时,结膜的弧形和角巩膜缘的切开,使得眼内上皮增生的发生率较高。若角巩膜切口内有结膜、虹膜及玻璃体嵌钝时,角巩膜切口愈合不良,眼内上皮增生的危险性更大。再者,在手术操作过程中,结膜组织附着于手术器械上而被带入眼内,亦可引起此并发症。眼内上皮增殖,严重者可引起青光眼发生和虹膜囊肿形成。侵入前房的上皮细胞使虹膜根部与周边角膜粘连,导致闭角型青光眼。或侵入的上皮细胞覆盖于房角
After perforation ocular trauma and intraocular surgery, conjunctival epithelial cells and corneal epithelial cells can invade the eye and proliferate, which is called epithelial downgrowth (epithelial ingrowth). When cataract surgery, the curvature of the conjunctiva and the limbus of the cornea make the incidence of intraocular epithelial hyperplasia higher. If the scleral incision within the conjunctiva, iris and vitreous embedding blunt, scleral incision healing poor, greater risk of intraocular epithelial hyperplasia. In addition, during the operation of the operation, conjunctival tissue attached to the surgical instruments and brought into the eye, can also cause this complication. Ocular epithelial proliferation, severe cases can cause glaucoma and iris cyst formation. Epithelial cells that invade the anterior chamber adhere the iris root to the surrounding cornea, resulting in angle-closure glaucoma. Or invasive epithelial cells cover the corner of the room