H46: Optic neuritis

Your optic nerve is inflamed.

The retina is a layer inside the eye. It contains a lot of nerve cells that perceive light. This enables us to see colors and differences between light and dark. The nerve cells in the retina also form the optic nerve that runs from the eye to the brain. The optic nerve can become inflamed due to other disorders or to pathogens, for example.

When the optic nerve is inflamed, the person’s vision usually gets worse quickly. The affected eye is sore, too. The pain may become more severe if one moves one’s eyes. And one may see colors in an abnormal way.

Additional indicator

On medical documents, the ICD code is often appended by letters that indicate the diagnostic certainty or the affected side of the body.

  • G: Confirmed diagnosis
  • V: Tentative diagnosis
  • Z: Condition after
  • A: Excluded diagnosis
  • L: Left
  • R: Right
  • B: Both sides

Further information


This information is not intended for self-diagnosis and does not replace professional medical advice from a doctor. If you find an ICD code on a personal medical document, please also note the additional indicator used for diagnostic confidence.
Your doctor will assist you with any health-related questions and explain the ICD diagnosis code to you in a direct consultation if necessary.


Provided by the non-profit organization “Was hab’ ich?” gemeinnützige GmbH on behalf of the Federal Ministry of Health (BMG).