Abstract: If the highrisk groups of primary angle closure glaucoma can be screened before acute angle closure attacks or peripheral anterior synechia formation among anatomically narrow angle eyes, and proper prophylactic treatment can be performed in time, subsequent glaucomatous optic neuropathy can be prevented. Each of those methods, such as gonioscopy，ultrasound biomicroscopy，anterior segment optical coherence tomography and Scheimpflug photograph, has advantages and drawbacks. Latest research shows predicting and screening for PACG involved with fairly wide range of biometric measurements, including the parameters on anterior chamber，angle opening degree, iris, lens, volume change of iris, and uveal effusion as well. This article briefly reviews research advances in predicting and screening methods for high risk cases of the primary angle closure glaucoma.  (Int Rev Ophthalmol, 2013, 37: 311-316)