Most common. No identifiable associated condition.
Criteria: a) Normal CT/MRI
b) LP shows normal contents and high pressure
c) Papilledema may or may not be present.
NB. No papilledema no threat to vision.
Patients with viral, bacterial, fungal infections, tumors, inflammatory conditions that raise ICP do not have IIH.
Enlarged blind spot
Nasal inferior constriction
Causes of permanent visual loss include:
Ischemic and compressive damage to optic nerves
28 pts, 20_, 8_ with progressive VF defect, decreasing VA.
Results: VF unchanged or improved in 80%
VA unchanged or improved in 85%
Papilledema resolved in 100%
53% showed improvement in fellow eye not operated on
68% H/A improved
88% TVO’s resolved
Does not seem to lower ICP
1/40 retrobulbar hem with visual loss
Unilateral operation recommended unless severe bilateral visual loss or in patients with high surgical risk.