ONLY the most eagle-eyed will be able to spot the 13 hidden faces in this devilishly difficult optical illusion. Put your vision to the test with this tricky brainteaser, which will have you ...

It's worth pointing out that the illusion may not be specifically to do with faces, but with things that we are used to seeing one way up. On this note, experiments have been done with upside-down ...

YOU could have a high IQ if you can find the face in this picture in time. Players will have just seven seconds to see past the bird and figure out this tricky optical illusion. The image shows a ...

The peripheral drift illusion causes us to perceive motion in a still image. A new study shows that the mechanism of this illusion relies on changes in pupil size.

The key to perceiving the peripheral drift motion illusion is to look at the images while moving your eyes back ... illusions, and face recognition. Get the help you need from a therapist near ...