J Neuroophthalmol 2021 Dec;41(4):e464-e469
Departments of Ophthalmology (BSC, MYL, BBB, JHL, RAS, NJN, VB), Radiology and Imaging Sciences (SA, AMS), Epidemiology (BBB), Neurology (BBB, NJN, VB), and Neurological Surgery (NJN), Emory University, Atlanta, Georgia.
Background: The tortuosity of the optic nerve can be quantified radiologically by measuring the angle of optic nerve deformation (the "optic nerve angle" [ONA]). In patients with idiopathic intracranial hypertension (IIH), lowering the intracranial pressure (ICP) to a normal range by lumbar puncture leads to straightening of the optic nerve and an increase in the measured sagittal ONA on MRI. It is uncertain whether there is any correlation between ONA and cerebrospinal fluid (CSF) opening pressure or visual function. Read More