[Anesthesia for vitreoretinal surgery using a retrobulbar catheter technique].

Objective: To evaluate peroperative pain management using a flexible spinal anesthesia catheter introduced into the retrobulbar space which allows injections of local anesthetics for vitreoretinal surgery.

Methods: Twenty-five patients who underwent vitreoretinal surgery receiving retrobulbar anesthesia with 3.5 ml ropivacaine 0.