·AIM:To evaluate the clinicaI effects of phacoemulsification(phaco)with foldable intraocular lens(IOL)implantation in the treatment of acute angle-closure glaucoma.·METHODS:Twenty consecutive patients 23 eyes were included in this study with acute angle-closure glaucoma and cataract,and phacoemulsification with foldable IOL implantation were performed.Visual acuity and intraocular pressure(IOP)were recorded pre-and postoperatively.The pre-and postoperative changes about the anterior chamber depth(ACD)and angle opening distance(AOD500)were detected by ultrasound biomicroscopy(UBM).·RESULTS:The mean visual acuity was increased from 4.16±0.38 of preoperative to 4.75±0.10 of postoperative,and IOP was reduced from 48.65±7.34mmHg to 16.65±1.97mmHg.ACD of pre-and postoperation were 1.35±0.04mm and 3.51±0.07mm,AOD500 of pre-and posto-peration were 225.09±12.43μm and 511.18±12.20μm respectively,there was significant difference(P<0.01).·CONCLUSION:Phacoemulsification with foldable IOL implantation is a safe and effective method to treat acute angle-closure glaucoma.·