In order to be eligible to participate in this study, a subject must meet all of the following criteria: aged 18 years or older, ASA I or ASA II, scheduled for elective surgery under general anesthesia, with a planned duration of \> 30 minutes, that can be routinely performed with a LMA.
You may not be if
Scheduled for head or neck surgery
Scheduled for neurosurgery
Scheduled for laparoscopic or thorascoscopic procedures
Scheduled for procedures that require Trendelenburg or anti-Trendelenburg positioning
Neurological disorders
Glaucoma
History of bilateral eye related trauma
Intellectual disability
Clareo Health | The Effect of a Laryngeal Mask Airway on Optic Nerve Sheath Diameter
