The famous greek philosopher Aristotle declared that human beings are easily manipulated by what they see, he came to this conclusion after spending some time looking at a waterfall and then, when directing the gaze to the rocks they seemed to move in the opposite flow to the waters of the waterfall.
In this challenge, can you see which of the squares below has a different color? No? Move closer to the screen and look carefully for a few more seconds.
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Read more: Visual challenge: see this optical illusion and save the rabbit
More about optical illusions
Optical illusions test your visual perception by challenging your eyes and logical thinking. Studies related to this area began in 1915 with the cartoonist W. AND. Hill who published the following drawing and became known worldwide.
The visual system responsible for putting together the image we see is the junction of the cells involved that makes the brain discover the color of an object and process the information. The image below is a cognitive optical illusion, it will confuse your perception of colors.
If you couldn't spot the different colored square, don't worry, most people can't tell the difference either.
The answer to this visual challenge is below!
Challenge Answer
But if you're still confused about the colors, don't worry! Here's an explanation: our brain has a tendency to perceive colors differently when they are alone or when they are in contrast to other colors. The ambiguity of our challenge was due to the difference in lighting.
For example, have you ever noticed that gray looks darker when it's close to white and lighter when it's close to black? Neuroscientists believe that the neural signals responsible for transmitting information about the pigments in our visual field are calculated through an average of colors and this is what causes the perception of colors many different.