Why does the pupil change when lying? Why? I want to find out early.

Scientists have found that primary school students can't "lie". It is a sensitive display of important functions and an extension of the brain. The student is surprisingly sensitive to interest. Experiments show that people can't distinguish the subtle differences between two identical paintings, but the reflection of the pupil can be displayed. People who often read books and are good at thinking have a special light in their eyes-Lincoln. Jewelers can charge according to the pupil size of customers, gamblers.

We know that eyes are human visual organs. Eyes are not only visual organs, but also can express people's rich emotions. As people often say, "the eyes are the windows to the soul".

The reason why eyes can communicate vividly is actually reflected by the expansion and contraction of pupils, the rotation of eyeballs, the opening and closing degree of eyelids and long-term gaze.

People's thoughts and emotions are closely related to the changes of pupils. Disgusting stimuli can make people's pupils contract; Euphoric stimulation will dilate pupils; Panic or excitement will enlarge the pupil four times as much as usual, so the change of pupil is a sign of the activity of the central nervous system.

Eye movements can also show ongoing thinking activities. If two people talk, their eyes are relatively stable and rarely turn, which means they are sincere; If his eyes wander and twinkle, it means he has hidden plans.

The degree of eyelid opening and closing can generally reflect a person's mental state. Depression and trouble can make people's eyelids droop, and talking with people with their eyes half closed is a sign of frivolous arrogance and arrogance.

The most important skill that the eyes can use is gazing. Gaze is a means of communicating with people. Strangers should try to avoid staring at each other. Glare, show majesty. Parents staring at the wrong child will make the child afraid to lie; The gaze between friends is more expressive, so people often say "talking eyes".