Optimizing the surgical field in Dacryocystorhinostomy: A comparison of Labetalol versus Local Anesthesia Infiltration under Total Intravenous Anesthesia

INTERVENTION: Labetalol Local anesthesia infiltration group CONDITION: ; Eye Diseases ; Surgery ; Anaesthesia Anaesthesia Eye Diseases Surgery PRIMARY OUTCOME: The impact of Labetalol versus local anesthesia infiltration on surgical field quality. SECONDARY OUTCOME: Perioperative hemodynamic stability, including heart rate and blood pressure variations after administration of the intervention. Postoperative pain scores for both groups. Any needed additional intraoperative medications for hemodynamic control. Recovery time from cessation of anesthesia to discharge from recovery room. Patient and surgeon satisfaction with the anesthetic techniques used. INCLUSION CRITERIA: Adult patients (=18 years old). Both genders. American Society of Anesthesiologists (ASA) physical status I–II . Patients scheduled for elective unilateral open external dacryocystorhinostomy (DCR).