Optical illusions: a man and a fly see almost the same

Optical illusions: a man and a fly see almost the same

Despite millions of years of evolution, the optical illusions continue to haunt various organisms. The neuroscientists find them fascinating, studying them for decades. But in fact, the optical deceptions have existed for much longer than science suggests and unites different types. As part of a new study, the scientists have found that the eyes of fruit flies are as easily fooled by visual patterns with high contrast as human eyes.

They can see movements where they don't actually exist. It is a startling fact that accompanies two different organisms over millions of years of evolutionary development. The last common ancestor of modern flies and humans could have lived half a billion years ago as two completely different species that perceive movement as a similar strategy.

So the neuroscientist Damon Clarke of Yale University does say. A knowledge about these general strategies can provide a new knowledge about the human visual system. The specialists decided to combine behavioral measurements, genetic traits, and neural imaging that ultimately led to an amazing conclusion.

The fruit flies, Drosophila Melanogaster, just like humans, can perceive illusions and movements in them. It is due to the basic patterns of the brain. The only difference is that the human brain is a more complex and multifaceted organ. Previously, a science believed that the development of the organs of vision of a fly and a person took place in completely different ways.

But a recent research revealed a common genetic basis for the eye in all types of animals. The scientists believed that at the beginning of the evolutionary period, there was only one form of the visual organ that branched out over millions of years. And it was confirmed by the studies of the optical illusions in primates, cats, dogs, fish that the optical illusion made see them the movements where they are not.

But it has never been proven in fruit flies. Their extremely small brains prevented the scientists from studying the activity of neurons. Modern technical capabilities made it possible to do this, and the scientists were surprised by the fact of a perception of motion in static images as well as a person perceives them. It gives an idea of what happens in the human brain.

After all, no one knows exactly what an optical illusion is that prevails over the capabilities of the brain. According to one version, the eye sees movement in a static image due to the fact that the brain processes information too quickly.

According to another version, the optical illusions arise due to involuntary contractions of the visual perception of the eye when considering an object or detail. And both of these options may be true, but it needs to find a strong evidence.