The Efficacy of Dexmedetomidine versus Dexamethasone as Additives to Lidocaine 2 % for Peribulbar Block in Vitreoretinal Surgery: A Randomized Controlled Trial. - Hasan, Ahmed Hamody; Abu Bakre Osman, Samar Thabet; Taha, Elhaisam M.; Soliman, Haitham Sayed Moahmed; Ahmed, Waleed Adel (Egyptian Journal of Hospital Medicine, 2026)