To explore etiology and prognosis of retinal hemorrhage after trabeculectomy of acute angle-closure glaucoma. METHODS: Fourty cases (55 eyes) of acute angle-closure glaucoma were observed under direct ophthalmoscope 1 day- 1 week after trabeculectomy,and the patients with retinal hemorrhage were followed up. RESULTS:Eyesight recovered well in the 50 eyes with retinal hemorrhage and eyesight was not restored in the 5 eyes with macular hemorrhage.- CONCLUSION:The main reason for retinal hemorrhage is related with intraocular pressure sudden drops. Most of the prognosis are good.