Optical Illusion: You Have 20/20 Vision If You Can Spot The Owl Hidden In The Tree In 9 Second

 The brain tricks us into perceiving things that aren't there via optical illusions. The cause is fascinating; evolution is a key part.   

 This happens why? Survival requires the brain to quickly evaluate incoming data and piece together fragmentary information.   

 The brain uses colour, patterns, and light and shadow to generate this effect. What we see is not what we get.   

 Greek philosopher Epicharmus suggested in 5 B.C. that our senses, not our thoughts, misread optical illusions.  

 According to Protagoras, the environment affects how our senses interpret information.  

 Plato thought otherwise. He thought our minds and eyes perceive the world simultaneously.  

 Even today, this idea holds that optical illusions occur when our brains fool us into perceiving objects that aren't there.  

 Today's optical illusion further tests the brain-eye connection. A well-camouflaged owl is in the tree.  

 Call it nature's joke, this one's hard to spot.   

 Divide the image into grids and scan it top-to-bottom in a rigorous manner to break any optical illusion.   

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