Table 1: Modified Dandy Criteria for IIH

1. Signs and symptoms of raised intracranial pressure.
2. Absence of localising findings on neurological examination (except sixth nerve palsies or rarely other false localising signs.)
3. Normal neuroimaging with no evidence of venous sinus obstruction. (empy sella and dilated optic nerve sheaths are acceptable.)
4. A CSF opening pressure greater than 250mm H2O.
5. Normal CSF constituents.