- The time to eyelid movement score of ≤1 will be recorded. If, after 10 minutes the block is inadequate a 3-4 ml supplementation of lidocaine 2% by the same technique will be given. If the block is still inadequate, it will be considered a failure and excluded from the study. When the block is considered a failure the patient will receive either supplemental inferotemporal injection (if ultrasound excluded presence of posterior staphyloma), topical anesthesia, intravascular fentanyl 50 mcg or general anesthesia according to the patient condition.