Figure 2. Changes in mean arterial pressure (MAP) (A), heart rate (HR) (B), and oxygen saturation (O2 Sat) (C) during assessment. All data are expressed as mean ± SEM (abbreviations: A, acetaminophen; C, control; M, melatonin; T1, entering to the operating room; T2, during retrobulbar block; T3, during operation; T4, 20 minutes after operation; T5, end of operation; T6, recovery room).
