方法：记录患者第一次手术前、术中及术后的各种情况，发生眼压不降时眼部专科检查(眼压、视力、房角等)及UBM检查等，回顾分析2009-09/2010-12复合式小梁切除术后眼压不降30例34眼的病因。

结果：复合式小梁切除术后眼压不降的病因：滤过泡扁平瘢痕化12例15眼，恶性青光眼倾向5例6眼，术后前房出血3例3眼，巩膜瓣内切口欠通畅2例2眼，术前高眼压持续时间长2例2眼，包裹性滤过泡2例2眼，术前葡萄膜炎1例1眼，术后膨胀期白内障1例1眼，手术操作不良1例1眼，手术方式选择欠妥1例1眼。

结论：复合式小梁切除术后眼压不降主要原因是术后滤过泡扁平瘢痕化。

METHODS:Clinical data of 30 patients 34 eyes including the first time preoperative, intraoperative and postoperative situation were recorded, and when high IOP occurred, ophthalmic specialized examination(intraocular pressure, vision, angle of anterior chamber, etc)and UBM was perfoemed to analyze the cause of high IOP after trabeculectomy from September, 2009 to December, 2010.

RESULTS:The cause of high IOP after trabeculectomy included: filtering bleb flat scarring in 12 cases 15 eyes; malignant glaucoma tendency in 5 cases 6 eyes; postoperative bleeding anterior chamber 3 cases 3 eyes; sclera disc incision unobstructed 2 cases 2 eyes; Preoperative high IOP lasted for a long time in 2 cases 2 eyes; encapsulated filtering bleb in 2 cases 2 eyes; Other reasons such as preoperative uveitis in 1 case 1 eye; postoperative intumescent cataract in 1 case 1 eye; poor operation in 1 case 1 eye and surgery way not chosen wisely in 1 case 1 eye.

CONCLUSION: The main reason for high intraocular pressure after trabeculectomy is the postoperative filtering bleb flat scarring.