you can read more below, but this is the part i find really interesting:

In 2004, Harbisson was not allowed to renew his UK passport […]The passport office would not allow Harbisson to appear with electronic equipment on his head. Harbisson wrote back to them insisting that the eyeborg should be considered part of his body as he had become a cyborg. Letters from his doctor, friends and his college were sent to the passport office to give him support. After weeks of correspondence Harbisson’s prosthetic device was included as confirmation of his permanent and embedded cyborg status.

readmorewikipedia:

Neil Harbisson (27 July 1982) is a British-Spanish cyborg artist, musician and performer best known for his self-extended ability to hear colors. In 2004 he became the first person in the world to be fitted with an eyeborg and to be officially recognized as a cyborg by a government.

The eyeborg works with a head mounted camera that picks up the colors directly in front of a person, and converts them in real-time into sound waves.