This is something posted by Dr Sclafani re cancer patients who have their internal jugular veins tie off in drastic neck procedures. It has nothing to do with my myopia getting better, but it might well tell how vision might get affected when the internal jugulars are tied off:
i find it extraordinary that the naysayers can editorialize whatever they want in a biased manner and have it published rapidly.
It is true that there are papers that state that you can tie off (ligate) both internal jugular veins during radical neck surgery for cancer without developing permanent neurological consequences. (of course, these authors do NOT mention Multiple Sclerosis!)
This does not mean that surgeons ligate both jugular veins with impunity or that all surgeons do it.
Many ligate one and then come back another day to ligate the other because of the concerns about significant complications.in one paper, patients who had simultaneous one-stage bilateral neck dissection, often with jugular vein ligation, had a 10% mortality and an 11% major complication rate. But when sparing of the jugular vein was successful or if the procedure was done in two stages, mortality was only 3%. I guess it does matter.
Several authors have reported severe complications of unilateral or bilateral jugular vein ligation. these include bilateral and unilateral blindness, thought to be caused by intraorbital hemorrhages related to the venous hypertension. Other consequences of jugular vein ligation reported in the literature include intraorbital hemorrhage, pseudotumor cerebri, intracranial hemorrhages, double vision due to cranial nerve compressions, dural sinus thrombosis,