Fig. 1

IOP of left and right eyes on different surgical positions with time. Note: A1: IOP of left eye on lithotomy position; A2: IOP of right eye on lithotomy position; B1: IOP of left eye on lateral decubitus position; B2: IOP of right eye on lateral decubitus position; C1: IOP of left eye on prone position; C2: IOP of right eye on prone position; D1: IOP of left eye on supine position; D2: IOP of right eye on supine position. T2: 10 min after general anesthesia in the supine position, T3: 10 min after changing position, T4: 1 h after the start of surgery, T5: 2 h after the start of surgery, T6: 4 h after the start of surgery, T7: 10 min before the end of surgery, T8: before leaving the operating room