When recognizing a liar, you shouldn't be guided by your eyes alone. It is important to remember the main thing when a person behaves honestly, even in a state of stress, his behavior, speech and views are connected into a single whole.
Aversion is a natural defense. In ancient times, a direct gaze meant a challenge. When meeting with wild animals, a person averted his gaze if he recognized their power and did not want to enter into conflict in order to protect himself from attack. Animals that show superiority behave in the same way before disappearing from sight. Therefore, a person, answering the question of the interlocutor, subconsciously averts his eyes, not because he is lying, but because he does not want or cannot expose himself to danger, be it words or actions. There are people who rarely tell lies. As a rule, they are then very worried, often give themselves away and usually repent. Deceiving, they either look away or lower their gaze. At the same time, they are very nervous and have almost no control over their gestures and facial expressions. Fussy tapping, twitching of legs or arms, shifting things from place to place - all these are sure signs of a lie. Their eyes often dart around, their gaze is not focused on one thing. When a person experiences anxiety, he can blink at an accelerated rate, his palms can sweat, cheeks blush, etc. However, it is worth considering that frequent blinking also accompanies the thought process, and excitement can be caused by the topic of the conversation. Pay attention to where the eyes of the interlocutor are directed. If he looks up and to the left, his memory is being accessed, and if he looks up and to the right, perhaps he comes up with some kind of visual image. When the gaze is directed downward, it can be concluded that your interlocutor is appealing to his emotions. All this can become a weapon in the hands of a deceiver. Liars may have intentionally blocking their eyelids when answering a question. The lashes stay down for a few seconds longer than usual. A deceiving interlocutor may also often touch his eyes, experiencing internal discomfort and nervousness, but there are some people who are said to be second nature to lying. They carefully build a line of their behavior, try not to betray their true "I" by gestures or facial expressions. It can be very difficult to follow the gaze of such a person. Sometimes he looks straight in the eyes, realizing that this is the only way he can emphasize his "sincerity" and "honesty." But sometimes, concentrating on a deceitful presentation of the situation, he cannot sufficiently control his gaze and facial expressions. Then, trying to convince his interlocutor, the liar puts all his efforts into the power of the eyes. At the same time, they look unnaturally bulging, and at the same time their lips begin to involuntarily compress, especially in the pauses between words. Often raising his gaze upward, with all his appearance, he makes others understand that the sky is a witness to his "honesty".