Data collection
INTRAOCULAR PRESSURE
Preoperative general indicators included age, gender, weight, body mass index (BMI), and ASA classification. Systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate (HR), tidal volume (VT), PETCOThe primary outcome of this study is IOP. IOP at each time point was measured by a skilled ophthalmologist blinded to the group allocation. Before the induction of anesthesia, the patient’s eye was topically anesthetized with 2 drops of 2% lidocaine. The IOP was measured three times by Tono-Pen AVIA intraocular pressure meter (Tono-Pen AVIA, Reichert Technologies, Depew, NY, USA), and the mean values were taken.