This optical illusion expands and contracts as your eye moves across the screen. (credit:OpticalIllusions.Blogspot)
Expanding Vortex(02 of14)
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This optical illusion expands and contracts as you focus on different areas of the image. (credit:OpticalIllusions4Kids.blogspot)
Zebra Roll(03 of14)
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Look closely. This wavy zebra-like pattern gives off the illusion of cylindrical turning. (credit:Eye-Illusions.com)
Psychedelic Color Vortex(04 of14)
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This psychedelic color vortex pulsates with a mighty illusoriness. (credit:Optical-Illusions.in)
Texture Zoom(05 of14)
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The sharp/fuzzy contrast creates an optical illusion that makes the circle\'s pattern move when you move your head closer to the image. (credit:ScienceBob.com)
The Rippling Eye(06 of14)
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This pattern -- which resembles an eye -- sends ripples moving outward from the center. (credit:Flickr: PowerPatrick)
Square Bulge(07 of14)
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This illusion gives off the sense of infinite expansion. (credit:flickr: StuckInAlabama2012)
Circular Gears(08 of14)
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These overlapping circles give off the impression of gear-like circular movement. Try to make the motion stop. (credit:Flickr: NightRStar)
Irregular Circular Vortex(09 of14)
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This vortex moves subtly as the eye travels across the image. (credit:Flickr: irargerich)
Parallel Lines?(10 of14)
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Are these lines parallel or curved? (credit:Flickr: PIzzoDisevo)