This study aimed to assess the effectiveness of the Subconjunctival bupivacaine on postoperative pain in Strabismus surgery under general anaesthesia.

40 patients will schedule for elective Strabismus surgery under general anaesthesia and randomly allocated into two groups to receive Subconjunctival 0.5%Bupivacaine group(B) or Subconjunctival placebo 0.9% normal saline group at the end of the surgery and assess the postoperative pain at 0th,30th, 60th,2nd h, 4h,6h,12h,24h.and post operative nausea and vomiting.

Inclusion Criteria:

• All patients aged 14 _30 years old with body mass index 18_28kg/m.
• American Anaesthesiologist Association physical states I,II.
• singed informed consent to participate in the study and were scheduled for strabismus operations under general anaesthesia.

Exclusion Criteria:

• were patients with chronic pain.
• ocular hypertension.
• inability to communicate.
• history of hematological disease.
• allergy to local anesthetic drugs.