It must be assumed that if our eyes do not see, they are lying to us. It seems like a proverb, but it is a reality demonstrated by a “simple” image, the object of a scientific work to study the real scope that our sight can have.

Black dots on a very light grid tend to disappear, and our eyes show them in groups, giving us the sensation of movement. The incredible optical illusion is the work of two scientists from the École Normale Supérieure in Paris and the University of Oregon (United States).

How many black dots do you see at the same time?

Yes, our eyes “lie” to compensate for the inability to process information simultaneously: in the image there are twelve black dots in some positions, but our brain cannot see simultaneously, giving us the illusion of a moving image, such if they were different frames of a movie that is running.

The drawing was first published in 2000, then picked up several times by mathematicians, psychologists, and simple enthusiasts, and is known as “ Ninio’s Illusion, ” based on the name of its main author.

“When the black (or white dots in this image) in a bright grid are small and colored black, they tend to disappear – says the original article – You only see a few at a time, in groups that move irregularly on the page . Where the perception “disappears”, the meshes in the gray intersections appear “continuous”, creating other intersections and other black points in reality but that do not exist “.

But why does this happen? Unfortunately (or fortunately) we are very limited and our eyes are too. The cause is, in fact, our peripheral vision : if we fix a specific point, our eyes see the edges badly and the brain tries to compensate in some way, extrapolating what it can from the visual information at its disposal, in a sense, “they invent “ Or ” fill “, as if everything were” a continuous graphic “ , such as a movie, in search of the continuation, our eyes walk on the image.

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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