B-scan ultrasound may be useful for diagnosis of optic perineuritis, especially with inflammation surrounding the optic nerve.
Ayaka Edo, Yosuke Harada, Yoshiaki Kiuchi 2018, 'Usefulness of B-scan ocular ultrasound images for diagnosis of optic perineuritis',American Journal of Ophthalmology Case Reportshttp://www.sciencedirect.com/science/article/pii/S2451993617303766. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)