Um, getting "lost" around the optic nerve or causing a CSF leak (though that
can be patched pretty easily) can make a difference in the result.  Why
would you think that being able to better visualize the field would not
yield a higher probability of positive outcomes?  In the case of patients
with previous revision, the anatomical landmarks can be significantly
altered, and being able to successfully navigate those structures can
minimize bleeding and allow more judicious excision. This can allow faster
healing and less discomfort for the patient.  Of course, the final
determinant is the skill and experience of the surgeon, but this can be a
powerful tool.

Well for me it was the constant sinus infections and the cold's.
Everyone catches a few things from time to time. But when the pattern
starts to change and I start getting sick every other week which is
what its like now for me I began to ask myself what is going on here.
Then if you are unfortunate enough to get any horrible sinus pain
associated with it, including the intervals you are well you know you
are headed for trouble. But everyone has their own symtoms. You should
discuss things with your doctor. In fact, it might be a good idea to
keep a journal and write in it how you feel each day keeping note of
the syptoms you get. I could help your doctor out a lot. Hope that
helps.