AIM: To evaluate the therapeutic effects of Nd:YAG laser in primary angle-closure glaucoma(PACG)by domestic ultrasound biomicroscopy(UBM).

METHODS: PACG(including acute, chronic)patients, a total of 31 cases 43 eyes were included in this study. UBM measurement of intraoperative central anterior chamber distance(ACD), and the angle opening distance(AOD)in 12:00, 3:00, 6:00, and 9:00 four directions, angle opening in degrees(AA), and intraocular pressure(IOP)was performed before and after surgery, respectively.

RESULTS: The postoperative IOP and central ACD had no significant difference compared with that of preoperative. AOD and AA increased significantly preoperatively and postoperatively in four directions.

CONCLUSION: Angle changes and laser patency can be observed in vivo before and after surgery by UBM, which is a more effective method for diagnosis and treatment of PACG.