Fig. 16. The Carlo Traverso maneuver. Shortly after a guarded filtration procedure, the pressure may become elevated. Usually, this elevation is due to failure of filtration through the sclerostomy. This elevation can be corrected easily by depressing the sclera just temporal to the tempororadial groove or nasal to the nasoradial groove. This depression should be gentle and focal, and a sterile applicator should be used. This maneuver can be repeated many times during the first 2 weeks postoperatively. A. Anterior view. B. Cross section of superior view.