For the past 20 years, self-declared “cyborg artist” Neil Harbisson has provoked debate with his “eyeborg” – a surgically attached antenna.

Harbisson, who grew up in Barcelona, is colour blind, having been born with the rare condition achromatopsia, which affects one in 33,000 people.

This means he sees in what he calls “greyscale” – only black, white and shades of grey.

But he decided to have surgery in 2004 which changed his life – and his senses – attaching an antenna to the back of his head, which transforms light waves into sounds.

When film director Carey Born came across Harbisson, classed by Guinness World Records as “the first officially recognised ‘cyborg’,”, external she was “gobsmacked and astonished”.

Her next move was to meet him, and then make a film about him – Cyborg: A Documentary.

It explores how he navigates his life, along with effects and implications of his unusual surgical procedure.”