Abstract : Idiopathic intracranial hypertension is a syndrome of increased intracranial pressure of unclear etiology that most often occurs in obese women of childbearing age. To clarify relationship between cerebrospinal fluid pressure (CSF) and Neuro-ophthalmological manifestations of idiopathic intracranial hypertension. A prospective observational study of patients with newly diagnosed as idiopathic intracranial hypertension including patients with idiopathic intracranial hypertension who were admitted in neurological unite of Baghdad teaching hospital/Medical city and Al-Imamian Al-Kadhimyaian Medical city, during May 2019– February 2020. Patients were divided in to 3 groups according to CSF and Neuro-ophthalmological manifestations. CSF has been used to classify patients into three groups; group 1 (< 300 mm water) found in 10 (33.3%) patients, group 2 (300-369 mm water) found in 7 (23.4%) patients and third group (≥370 mm water) found in 13 (43.3%) patients. The mean pressure was 349.7±87.2 mm water. Significant association were found between transient visual obscurations, diplopia, squint, retro orbital pain and Photopsia with high CSF≥370 mm water. Significant association were found between right and left disc grade, right and left 6th nerve palsy, right and left cotton wool spots, and right and left retinal hemorrhages with high CSF≥370 mm water. There is significant association were found between transient visual obscurations, diplopia, squint, retro orbital pain, Photopsia, disc grade, 6th nerve palsy, cotton wool spots, and retinal hemorrhages with high cerebrospinal fluid pressure. No significant relationship between secondary optic atrophy and CSFin our study.