Background: One of the concerns of the anesthetists in performing surgical procedures is hemodynamic changes after laryngoscopy and tracheal tube intubation. In these cases, stress response with the release of catecholamines leads to increased blood pressure and heart rate in patients who are prone to cardiovascular disease and cerebral events, leading to the life-threatening risks. Objectives: Endotracheal Intubation (ETT) is one of the most stress response techniques for airway management. Here, we compare the effects of tree devices including ETT, laryngeal mask airway (LMA) classic, and I-gel with each other. Methods: The present study investigated the hemodynamic changes in patients undergoing elective cataract surgery after the intubation of an endotracheal tube. This clinical trial study was conducted on 75 patients with ASA class I or II in both genders and in the age group of 50 -65 years old. The effects of LMA Classic ™ and I-gel were also investigated. In this study, patients' vital signs