Subacute myelo-optic neuropathy (SMON) is a rare neurological disorder that can cause vision loss and spinal cord damage. It can be difficult to describe, and many people may be unsure what SMON is. As a result, it can be helpful to know some synonyms for SMON. This may include terms like progressive myeloneuropathy with ophthalmological changes, SMON-like illness, and Japanese subacute myelo-optic neuropathy. Other terms that may be used to describe this condition include toxic optic neuropathy or toxic myeloneuropathy. While these terms are not exact synonyms, they may be used interchangeably in some cases to describe the same condition.