Do you like optical illusions? Surely yes, who does not like them, they are an example of the traps that our brain and perspective play on us. Let’s take a look at the following optical illusion below that is particularly amazing and will blow you away. It shows a variant of what is called the “Cafe Wall Optical Illusion.”

The optical illusions are not only a good riddle, like a crossword puzzle or entertainment function, are important tools in visual research to help us understand how the visual processing functions in normal brain and in the diseased brain. Beyond their entertainment value, one researcher speculated that illusions may also have an evolutionary purpose.

Illusions occur when the brain tries to perceive the future, and those perceptions do not match reality. Although there is no single reason why illusions take place, it can be said that since the brain is a limited structure with limited resources including its number of neurons, wires and neural connections, then in some cases, illusions can be due to the brain’s need to take shortcuts. Simply put, the brain may need to quickly give more importance to some features in a visual scene than to others.

This optical illusion will challenge your brain

In the following image, you will see that the lines may appear to be ‘angular’, but they are actually straight. You can test it by squinting your eyes or viewing your phone or monitor as sideways.

Your brain is tricked by using alternating points and colors into thinking that the lines you are seeing are not actually parallel. But they are. It’s true. In fact, you can check it yourself with a metric ruler to show that this is so.

But what is the reason for the illusion? According to scientists, this illusion has to do with the way in which the black and white edges interact in opposite directions all along the straight edge, thereby causing the brain to be tricked into believing that there is an inclination in the line.

So if you erase the image, the effect disappears, and it’s because you can’t resolve the tiny black-and-white interactions once they are blurred, so the brain is no longer led down that path.

This illusion was first seen in 1979 on the wall of a cafe in Bristol, UK. It became a sensation and since then, it has been modified in various ways to create the same gimmick, entertaining and continuing to confuse the minds of everyone ever since.

By Dr. Eric Jackson

Dr. Eric Jackson provides primary Internal Medicine care for men and women and treats patients with bone and mineral diseases, diabetes, heart conditions, and other chronic illnesses.He is a Washington University Bone Health Program physician and is a certified Bone Densitometrist. Dr. Avery is consistently recognized in "The Best Doctors in America" list.

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