Comparison of the efficacy of 0.5% levopupivacaine, 0.5% ropivacaine and 0.25% levobupivacaine plus 0.25% ropivacaine for peribulbar anesthesia in cataract surgery Quantitative OCT Angiography Assessment of the Effect of Peribulbar Anesthesia on Retinal Microvasculature in Primary Open-Angle Glaucoma Patients Undergoing Cataract Surgery Intranasal Dexmedetomidine versus Oral Paracetamol as a pre-anesthetic medication in children undergoing adeno-tonsillectomy: A Randomized Clinical Trial.