Fig. 37. Deep sclerectomy with viscocanalostomy (DSVC): ultrasound biomicroscopy (UBM). This UBM demonstrates the intrascleral cavern approximately 2 weeks after DSVC. The trabeculodescemetic membrane (TDM) is shown as the window that allows movement of aqueous from the anterior chamber into the intrascleral cavern. A shallow bleb is not uncommon in the first 2 weeks after surgery and usually manifested as microcysts. (UBM courtesy of Robert Feldman MD.)