An optical illusion (also called a visual illusion) is an illusion caused by the visual system and characterized by visually perceived images that differ from objective reality. The information gathered by the eye is processed in the brain to give a percept that does not tally with a physical measurement of the stimulus source. There are three main types: literal optical illusions that create images that are different from the objects that make them, physiological illusions that are the effects of excessive stimulation of a specific type (brightness, color, size, position, tilt, movement), and cognitive illusions, the result of unconscious inferences. Pathological visual illusions arise from a pathological exaggeration in physiological visual perception mechanisms causing the aforementioned types of illusions.
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This one was a little more difficult for me. Depending on which side of the brain you are using, you can change the direction (clockwise or counter-clockwise) the dancer is spinning just by focusing. It helps if you just stare at the feet if you're having trouble.
Contributed by Jordan See
If you didn't know, this picture of a dress is going viral all over social media. Depending on the person viewing the photo, they may either see the color of the dress as being black/blue or white/gold. Personally, I see the dress as being black/blue. But if you don't believe me, show this picture to 4 other people and chances are they will see a different color than you! There are many theories that try to explain this incredible phenomenon, however I attached the link to a site I believe to be very informational! Check it out and come up with your own conclusions for this incredible optical illusion!
Contributed by Adam Trujillo
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