IRCT20141009019470N78 IRCT 2019-04-06 Shiraz University of Medical Sciences Preoperative hemodynamic Changes after Continuing or discontinuing Regular Angiotensin Converting Enzyme Inhibitors before Cataract Surgery a Comparative Study Preoperative hemodynamic Changes after Continuing or discontinuing Regular Angiotensin Converting Enzyme Inhibitors before Cataract Surgery a Comparative Study 2019-05-05 anticipated 200 Complete https://irct.ir/trial/38512 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Diagnostic, Randomization description: Patients randomly enter the study through the randomization chart which is derived from the www.randomization.com, Blinding description: The code and group name of each patient will be placed in a separate envelope and sealed and is delivered to the person who is responsible for the anesthetic of the operating room. He is the only person who is aware of the study group of each patient and will not be involved in other parts of the implementation and data collection. 2-3 Cataract. Intervention 1: Intervention group: Chronic ACEI users who do not stop their medication until the surgery. Intervention 2: Control group: Chronic ACEI users who discontinue their medication 24 to 12 hours before the surgery. No - There is not a plan to make this available Justification or reason for not sharing IPD is It is against our policies.