Preoperative sub-Tenon's capsule injection of ropivacaine in conjunction with general anesthesia in retinal detachment surgery.

Objective: To evaluate the effects of preoperative sub-Tenon's capsule injection of ropivacaine on intraoperative hemodynamics, postoperative pain, nausea, and recovery in patients undergoing scleral buckling surgery under general anesthesia (GA).

Design: Randomized double-masked controlled clinical trial.

Participants: Ninety-eight patients with primary rhegmatogenous retinal detachment undergoing scleral buckling surgery under GA.