Primary we will Compare the Efficacy between Dexmedetomidine and "Propofol-lidocaine" mixture in preventing the post operative emergence agitation following sevoflurane anasthesia in pediatric ophthalmic surgeries Secondary we will evaluate time of extubation, time of orientation, Hemodynamic variables, Visual analog scale ( VAS), facial expressions scale , Adverse events
patients aged 2-8 years .
ASA physical status I-II.
Scheduled for elective surgeries under general anesthesia with sevoflurane
History of psychiatric illness or cognitive impairment.
Known allergy to study drugs.
Severe cardiovascular, hepatic, or renal disease.
Chronic use of sedatives or opioids.