Atrophy of optic nerve detected by transorbital sonography in patients with demyelinating diseases of the central nervous system

Background and purpose Transorbital sonography (TOS) has emerged as promising imaging method for the diagnosis and follow‐up of acute optic neuritis (ON). Available studies report an increase in the optic nerve diameter (OND) and the optic nerve sheath diameter (ONSD) in the case of a first episode of ON in the affected eye compared to either the contralateral unaffected eye or controls. However, the utility of TOS in the case of recurrent...