Idiopathic intracranial hypertension: Imaging and clinical fundamentals

Figure 10  Posterior globe flattening and optic nerve head protrusion. A: An axial T2-weighted magnetic resonance image at the level of the globe and optic nerve in a normal patient is provided for reference. Note the normal, expected curvature of the posterior aspect of the globe; B: An axial T2-weighted magnetic resonance image at the level of the globes and optic nerves in a patient with signs and symptoms of idiopathic intracranial hypertension demonstrates loss of the expected curvature of the posterior aspect of the globes with flattening (dashed straight lines). There is also a slight emergence of right optic nerve head protrusion, evident by a “smear” of signal loss at the level of the posterior globe-optic nerve junction (arrow); C: An even more apparent example of optic nerve head protrusion is provided (arrow).