METHODS: Totally 48 patients(48 eyes)with secondary glaucoma after traumatic vitrectomy were randomly selected from May 2014 to January 2016. According to the principle of random grouping, the patients were divided into experimental group and control group. Experimental group: 25 eyes were implanted with Ahmed drainage valve(25 eyes)and control group: 23G 532nm laser ciliary body photocoagulation(23 eyes). The intraocular pressure(IOP)and related complications were compared between the two groups.

RESULTS: The intraocular pressure control rate was 83%(19/23)in the experimental group and 72%(18/25)in the control group, the difference was no statistically significant(χ²=0.76, P=0.19). The postoperative complication rate was 39%(9/23)of experimental group at 1wk after operation. The overall complication rate in the control group was 68%(17/25), which was significantly higher than that in the experimental group(χ²=4.02,P=0.03). At postoperative 3mo, corneal endothelial cell density of two groups decreased, compared with the preoperative, the difference was statistically significant(t=4.22, P<0.05), that of experimental group decreased by 13%, control group by 21%, with no statistical difference(P>0.05).

CONCLUSION: Ahmed drainage valve implantation and 23G cyclophotocoagulation are safe for the treatment of secondary glaucoma after traumatic vitrectomy. The operation is relatively safe, but 23G cyclophotocoagulation is more effective, for economic and practical, fewer complications.