Man's 'insane optical illusion' tattoo looks like giant hole in his head

mirror.co.uk:

A tattoo artist has left social media users baffled after inking an incredible optical illusion tattoo on the back of his client’s head.

Tattoo artist Matt Pehrson, who works at the Zion Tattoo Company in Utah, went to new extremes in his latest project, with an "insane optical illusion" he designed for his friend Ryan.

Matt inked a series of thick lines on Ryan’s bald head diverting inwards to the back of his skull. And with the help of some clever shading tricks, Matt managed to make it look like a massive gaping hole - and tattoo fans can't get enough.

The picture, which was originally posted on his Instagram account back in April where he has over 65,800 followers, recently received increased attention.