Surgical PION is posterior ischemic optic neuropathy caused directly by a surgical procedure. Affected patients become aware of the visual deficit only once they have regained sufficient alertness in the postoperative period — which may be several days after the operation itself.
This protocol addresses posterior ischemic optic neuropathy in which the causative event is a surgical procedure. Visual loss is discovered postoperatively, once the patient is alert enough to report or demonstrate it.
Once surgical PION has occurred, there is no satisfactory established treatment. The management focus therefore shifts to preventive strategies applied before and during surgery — the full structured protocol specifies what those measures involve.
DOI: 10.4103/0301-4738.77024