IOP under anesthesia

 Hi Dave, I am a student of anesthesia and am doing research on IOPs in patients who are in head-down positions for surgery. We are finding at our institution that even in patients without glaucoma, significant increases in IOP are occurring during longer procedures and may be associated with increased risk of post-operative blindness or partial visual loss. I am part of a team studying this issue and my specific offshoot of the research is on patients who present with glaucoma. Finally, my question: Are you aware of any information/ literature/ etc about glaucoma patients related to the surgical experience? Or 'optimization' of the glaucoma patient prior to surgery. I.e., do you recieve specific recommendations from your ophthamologist concerning which drops and when to take them the morning of surgery. Something that also may be of interest to you (and you may very well know this) but it is believed that general anesthetic agents can compromise the auto-regulatory mechanisms that allow e.g., a yoga-practitioner to stand on there head without a dangerous rise in IOP. I.e. the body adjusts itself (lower humor production, higher humor outflow, etc) when awake but not when under general anesthesia.