方法：将我院132例148眼行青光眼小梁切除术的原发性青光眼的患者分为以角膜缘为基底的结膜瓣(A组)64例72眼和以穹隆部为基底的结膜瓣(B组)68例76眼两组，术后随访6～12mo，观察眼压、滤过泡、前房深度及术中术后并发症。

结果：两种术式在术后成功率及术后降眼压效果上无明显的统计学差异。以穹隆部为基底的结膜瓣(B组)能得到更理想的滤过泡。以角膜缘为基底的结膜瓣(A组)表现出更多的并发症，如晚期滤过泡渗漏、低眼压等。

结论：以穹隆部为基底的结膜瓣(B组)优于以角膜缘为基底的结膜瓣(A组)。

METHODS: In a randomized controlled clinical trial, 148 eyes 132 patients were divided randomly into two groups, the base in limbus of cornea conjunctival flap(group A)was 64 cases(72 eyes)and base in fornex(group B)was 68 cases(76 eyes). The follow-up time was 6-12 months to observe intraocular pressure, filtering bubble, anterior chamber depth and intraoperative and postoperative complications.

RESULTS: No statistically significant difference of the two modes of conjunctival flap on the postoperative success rate and postoperative IOP. The fornix base conjunctival flap(group B)can get a better bleb. Limbal base conjunctival flap(group A)showed more complications, such as late bleb leakage, hypotony.

CONCLUSION: The basement by the fornix conjunctival flap(group B)is better than the limbal base conjunctival flap(group A).