Suggest you wander over to one of the neurology-neurosurgery forums.
JCH MD
All my MRI's were fine till after surgery.They took out a dranige tube early after surgery cause it was always falling out. I had some bleeding after surgery at the site of the surgery which mixed with my csf fluid and my eye doc discovered it. They rushed me into surgery quick only looking benid my eye to see fluid. I was only out of brain surgery 3 weeks. My nero recently dialed a codeman shunt down to 10 from 11. It has a range from 0 to 20. Now I am dizzerier and my vision is getting bad. I have nastagmus in left eye - horizontal type. I really think they rushed into this shunt and should have did a drain before that,
Brainstem surgery is among the most delicate and difficult done on the human body. It is much more likely that the condition that necessitated the surgery is what is causing your problems. Remember a VP shunt is put in to relieve danger pressure within the brain that without lowering can cause blindness and death.
Discuss with your treatment team.
JCH MD