Objective:To analyze the causes and treatment ofshallowanterior chamber in 50 patients(58 eyes)with primary angle closed glaucoma after trabeculectomy.Methods:330 cases(422 eyes)with primary angle closed glaucoma

enrolled from January 2006 to May 2009 in our hospital

were underwent trabeculectomy with application of 0.4 g/L mitomycin C once under and above sclera flap during all filtering surgeries.50 patients(58 eyes)were found with postoperative shallow anterior chamber.Results:The intraocular pressure of all patients were decreased.The incidence of shallow anterior chamber were found 50 patients(58 eyes).The causes were excessive aqueous humor filteration(29 eyes)

filter bleb leaks(15 eyes)

choroida detachment(5 eyes)

malignant glaucoma(3 eyes).Anterior chamber reformed in 8 eyes with surgical procedure and 88 eyes without any surgical procedure.Conclusion:The incidence of shallowanterior chamber is high after trabeculetomy with application of mitomycin C in patients with primary angle closed glaucoma.Most of such cases could be reformed through conservation treatment.