AIM: To analyze the result of ultrasound biomicroscopy(UBM)of patients with rhegmatogenous retinal detachment(RRD)who need to perform pars plana vitrectomy(PPV)to explore the value of clinical application of UBM at preoperation.

METHODS: Patients who underwent PPV for RRD in our hospital from January to December 2014 were selected. The preoperative results of UBM were recorded and the positive findings of UBM were analyzed, the value of preoperative application of UBM was investigated.

RESULTS:Totally 356 cases(357 eyes)of patients with RRD were received PPV. All patients were examined by UBM, 122 eyes(34.17%)were positive, 56 eyes were ciliochoroidal detachment, 28 eyes were narrow anterior chamber angle, 6 eyes were chamber angle-closure, 28 eyes were ciliary body cyst, 4 eyes were iris cyst, 11 eyes were anterior proliferative vitreoretinopathy, 1 eye was retinal cyst. There were 12 eyes existing two lesions at the same times. In this study, patients with choroidal detachment was detected by UBM in 56 eyes, the positive rate was 15.7%, while 25 eyes was detected by B-ultrasonography, the positive was 7.0%. The difference was statistical significant(χ²=13.382, P<0.05).

CONCLUSION: The patients with RRD have underwent PPV for the condition of illness, preoperative UBM can be examined to detect the condition of anterior chamber angle, iris, ciliary and anterior choroid, which is significant for comprehensively understanding the preoperative condition of patients, estimating the difficulty of the operation, and guiding operation and the postoperative follow-up.