滤过性手术以其手术方法简单和较高的降压效果而为眼科医生所喜用。临床常用的虹膜嵌入巩膜术(简称虹膜嵌顿术)即为滤过性手术之一。但是,于部分病人因术前有结膜组织变性、萎缩(如沙眼后期及结膜外伤后的瘢痕皱缩),而致术后滤枕结膜菲薄,甚而酿致穿孔、眼内感染等严重并发症;还有部分病人由于结膜组织较疏松,术后常形成轮廓清楚的 Filtered surgery is an ophthalmologist’s favorite for its simplicity and high blood pressure reduction. Clinical commonly used iris embedded scleral surgery (referred to as iris incarceration) is one of the filtration surgery. However, due to preoperative conjunctival degeneration and atrophy (such as scar shrinkage after trachoma and conjunctival trauma) in some patients, serious complications such as perforation and intraocular infection are caused by the postoperative filter-packing conjunctiva, There are still some patients due to loose conjunctival tissue, often forming a clear outline of the postoperative