Fig. 36. Deep sclerectomy with viscocanalostomy: deep sclerectomy. The deep scleral flap is rotated anteriorly and amputated at its base with Vannas scissors. Avoid penetrating into the anterior chamber while removing the deep flap. In this case, the resected flap is placed on the cornea to view the transition zone of the sclerolimbal tissue. Deep flap removal creates the potential intrascleral space for the percolation of aqueous.