SPI-directed Analgesia for Vitreoretinal Surgeries

in group A patients will receive pre-emptive analgesia using intravenous infusion of metamizol in a single dose of 1-1,25 gram

in group P patients will receive pre-emptive analgesia using intravenous infusion of acetaminophen in a single dose of 10-15 mg per kg of body weight

in group PBB patients in group BF will receive regional peribulbar block using a solution of 0,5% bupivacaine (2,5 ml) with 2% lidocaine (2,5 ml)

in group T patients will receive topical analgesia using a solution of 0,5% Alcaine