THIS weird and wonderful optical illusion appears to show some beautiful people turning rather ugly.
To get the full effect, the key is not to look directly at them.
Play the video to make the pictures scroll along and then stare at the cross in between the faces.
The attractive people don’t look quite so beautiful now.
Like many scientific discoveries, this one was a complete accident, according to the Illusion of the Year website.
While working on face photographs for an unrelated experiment, an undergraduate student was shocked to see the deformed looking faces appearing before his eyes.
The website explains that the distortion comes from the many differences between each face and the one that follows it.
A tanned face, for example, will make the face that comes after it seem pale and squinty eyes will make normal eyes bulge.
It comes as an optical illusion of a Venetian mask had people scratching their heads due to a hidden second perspective that you may not see at first.
The picture, originally produced by Gianni Sarcone, Courtney Smith, and Marie-Jo Waeber, may appear as a blurry face behind a mask.
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However, a number of people may not have noticed that the main features of the mask are actually composed of a man and a woman kissing one another.
Best Illusion of the Year Contest posted this image saying, "Once the viewer discerns two individual faces, his/her brain will 'flip' between two possible interpretations of the mask, making the viewer perceive two faces or one face in alternation.
"This kind of illusion, where the viewer experiences two equally possible interchangeable stable states in perception, is called 'bistable illusion.'"
Another stunning optical illusion reveals your secret weakness when it comes to your love life.
Whatever image you see first could tell you exactly what aspect of another person is your romantic weakness.
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And this optical illusion could reveal whether or not you're a control freak, depending on what image you see first.
A video made alongside this optical illusion has ten different puzzles which reveal the hidden truth about the inner workings of your brain.
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