scan, the patient will have to move his or her eyes side to side and up and down to allow complete visualization of the posterior segment.
Visualize the orbit in both transverse (see Figure 3) and longitudinal planes. After scanning through, the patient should be asked to move his or her eye right to left and up and down. A combination of still images and dynamic scanning clips will best document your exam.
- Parker C. Optic nerve sheath diameter: window to the soul? Broome Docs website. Accessed Feb. 15, 2019.
- Ohle R, McIsaac SM, Woo MY, et al. Sonography of the optic nerve sheath diameter for detection of raised intracranial pressure compared to computed tomography: a systematic review and meta-analysis. J Ultrasound Med. 2015;34:1285-1294.