How many faces can you spot in this drawing of roses?

This vintage optical illusion of a bunch of roses claims to test people’s eyesight to the very limit.

The black and white illustration was shared by online user Alan Sherin, who reckons he spotted six faces in the drawing, Gist Partner reveals.

But could there be more than that?

While some of the faces are very easy to spot, others are much trickier to find as they are cleverly concealed within the leaves and petals.

You can check out this optical illusion in the gallery above, and why not see how many you can find?