Ultrasound biomicroscopy in traumatic ocular hypotony.

Objective To summarise the results of ultrasound biomicroscopy(UBM) in the diagnosis of posttraumatic ocular hypotony,analyes the main cause of ocular hypotony,and evaluate the diagnostic ability of UBM.Methods 22 eyes of 22 patients with posttraumatic hypotony received UBM examination.9 cross-sectional images was captured for every patient with special attention to ciliary body and angle.Results The mean IOP of 22 patients was 6.42 mmHg.Medium duration of hypotony was 3 months.Ciliary body detachment was present in 22 eyes.Cyclodialysis cleft was present in 86.36% of the eyes.The extent of cyclodialysis cleft varied from 0.5 to 4 hours.The shapes of cyclodialysis cleft can be divided into four types.We performed ciliary body suturing to 7 patients according to the results of UBM examination.Conclusions The increase of aqueous outflow via suprachoroidal space is the main cause of posttraumatic ocular hypotony.UBM can be of great value in the diagnosis and management of patients with posttraumatic ocular hypotony especially cyclodialysis cleft.