P49. Monitoring for Ischemic Optic Neuropathy During Prone Spine Surgery? Pupillometry and Retinal Imaging

BACKGROUND CONTEXT: Postoperative visual loss (POVL) is a rare but devastating and poorly understood complication usually affecting longer prone spine surgery patients. The primary presentation is posterior optic neuropathy with bilateral visual loss which does not resolve. In a review of 93 spine cases, longer surgeries with higher blood loss and fluid replacement were partially descriptive of POVL while blood pressure was not (1).