滤过性抗青光眼手术后形成囊状滤过泡是不良后果之一。由于前壁变薄可致房水渗出,引起低眼压,向前隆起的结膜使病人感觉不适,轻微外伤易引起穿孔,有眼内感染的危险。作者认为囊状滤过泡形成的原因与筋膜囊前缘附着的局部解剖学有关系。筋膜囊前缘附着点和角膜缘间的距离因人而异,由几乎紧贴角膜缘到相距2～3mm不等。如筋膜囊距角膜缘2～3mm附着,那么此处的滤过泡前壁就只有结膜。当房 Filtration of anti-glaucoma after the formation of cystic filtration bleb is one of the undesirable consequences. As the anterior wall thinning can cause aqueous exudation, causing low intraocular pressure, forward bulging conjunctiva patients feel uncomfortable, minor trauma easily lead to perforation, the risk of intraocular infection. The authors conclude that the cause of the formation of cystic bleb is related to the local anatomy of the adherent front fascia. The distance between the front attachment point of the fascia sac and the corneal margin varies from person to person and is almost 2 to 3 mm apart from the limbus. If the fascia from the limbus 2 ~ 3mm attached, then here the filter bleb front wall only conjunctiva. When the room