Objective To explore the risk factors of malignant glaucoma occurrence after filtration surgery for primary glaucoma.Methods The clinical data of 331 patients(465 eyes)with primary glaucoma underwent traditional trabeculectomy from January 2008 to June 2013 in our hospital were collected and according to malignant glaucoma happen or not, the groups were divided.A ultrasound and UBM were used to detect the related parameters, including anterior chamber thickness,lens thickness,axis length and relative lens p...