Objective To evaluate the safety and effectiveness of semiconductor laser peripheral iridoplasty for the early treatment of acute attack of primary angle-closure glaucoma.Methods 58 eyes of 50 patients diagnosed with primary acute angle-closure glaucoma From April 2007 to November 2010 were randomly divided into treatment and control groups.The control group was treated with hypotensive drug,and the treatment group was treated with semiconductor laser peripheral iridoplasty.Intraocular pressure change,open angle,and visual acuity recovery of both groups,and postoperative complications of the treatment group were observed.Results Intraocular pressure decreased after treatment in both groups,but the argument were much more apparent in the treatment group than that in the control group（P0.05）.Functionally closed chamber angle reopened in different degrees in both groups.The reopen content was more than 1/2 24h after operation in 9 cases（32.14%）in the control group,and in 26 cases（86.67%）in the treatment group,showing a statistically significant difference between the two groups（P0.05）.Visual acuity did not changed in the control group,while it increased from acuity motion-0.2 before operation to 0.08～0.4 in the treatment group 24h after treatment.Conclusion Semiconductor laser peripheral iridoplasty can quickly make the function angle closure reopened,intraocular pressure decreased,the visual acuity recovered and with less complications,indicating it as a safe and effective method in the treatment of acute attacks of primary closed angle glaucoma.

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