Efficacy and Safety of Adding Atracurium to Percaruncular Block for High Myopes Undergoing Cataract Surgery

5mg in 1 ml normal saline

1500 iu powder diluted in 2 vial lidocaine 20 ml resulting 37.5 IU/ml lidocaine and 93.7 / 2.5 ml lidocaine or 15.6 IU/ml of the 6 ml solution

The patient will lie in a supine position and the eyes are in the neutral position. The needle (25 Gauge (G), 25 mm) insertion point will be just medial to the caruncle, directly perpendicular to the face and parallel to the medial orbital wall to 15-20 mm depth. After negative aspiration the already chosen local anesthetic mixture will be injected slowly. During injection, the globe will be palpated with one finger and tension in the lids will be tested frequently, if the lids become tense or if the tension is felt to rise in the globe, the injection will be stopped. After injection, external compression with Honan balloon inflated to 20-30 mm Hg will be applied for 10 minutes and will be removed every 2 minutes to test akinesia and anesthesia