The eyes are observable during sleep

The body of a sleeping person is at rest, but sometimes the eyes move vigorously. This hectic eye movement is associated with the most lively and real dreams. But do "see" your eyes something during this time?

This is a question that psychologists have asked for over 60 years. "The idea is that we are watching an imaginary scene of events," says Yuval Nir of Telavi University. "The idea is logical, but it is extremely difficult to find evidence to confirm it."
Most people experiencing BDO (fast eye movement) during sleep do not perform other movements. This further complicates experiments. Some researchers believe that eye movement can not be associated with observing anything, because the eyes of the unborn and the blind also move.
Nir and his colleagues observed people suffering from epilepsy. They had implanted electrodes - mainly in the middle temporal lobe, which mostly responds to the images. This allowed scientists to study 40 neurons from each participant. It has become clear that during sleep, the activity of the brain is at a peak just a quarter of a second after the eye has been placed - just as when the volunteers watched a picture waking up.

"It is likely that they are watching something in their sleep," adds Nir.

"This is extremely interesting. Eye movement is a sort of visual treatment during sleep, "said Michael Czisch of the Max Planck Institute of Psychiatry in Germany. He believes that visual scenes are a side effect of the recall of memories during sleep.
Researchers did not awaken the participants in the experiment, and therefore failed to understand what they were dreaming about. "But we're sure the brain jumps through different visual scenes. Every time you put your eyes, the brain records a new image, "ends Nir.

images source- https://pixabay.com