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青光眼滤过手术失败的最主要原因是滤过泪瘢痕形成，使滤过受阻。抗代谢药物的应用，使青光眼手术的成功率大大提高，但易引起角结膜毒性反应。这多用于有失败危险因素的青光眼。对于无失败危险因素的青光眼，术后早期如发生滤过道引流不畅或阻塞，施行眼球技压，可达到通畅滤?
Glaucoma filtration surgery failed the most important reason is the formation of filtration scar lacrimal, filtration blocked. The application of antimetabolites has greatly improved the success rate of glaucoma surgery, but it can cause keratoconjunctival toxicity. This is mostly used for glaucoma that has failed risk factors. For the risk of failure without the risk of glaucoma, early drainage after surgery such as poor drainage or obstruction, the implementation of eyeball pressure, can achieve smooth filtration?