Fig. 1From: Ultrasound measurements versus invasive intracranial pressure measurement method in patients with brain injury: a retrospective studyUltrasound measurements of the axial plane of the right eye. a Optic nerve sheath of a patient with normal intracranial pressure. No subarachnoid space around the optic nerve. b Optic nerve sheath of a patient with high intracranial pressure. Significant subarachnoid space around the optic nerveBack to article page