Throughout history, we've been preoccupied with the eyes and their effect on human behaviour. Eye contact regulates conversation, gives cues of dominance. Eye signals are a vital part of being able to read a person's attitude and thoughts. When people meet for the first time they make a series of quick Judgements about each other, based largely on what they see.

Here's a question. Something when gets excited, will expand up to 4 times it's original size? What is it?
Answer: Pupil.

Yes. When someone becomes excited, their pupils can dilate to up to four times their original size. Conversely, an angry, negative mood causes the pupils to contract to what are commonly known as 'beady little eyes' or 'snake eyes'. Lighter eyes can look more attractive because it's easier to see the dilation taking place.

Ppupil size is affected by one's general state of arousal. It increases when people view something that stimulates them.

The Eyebrow Flash

This gesture is a long-distance 'hello' greeting signal. The eyebrows rise rapidly for a split second and then drop again and its purpose is to draw attention to the face so that clear signals can be exchanged. However it is considered improper or impolite in Japan and has definite sexual connotations.

Gaze Behaviour-Where Do You Look?

Have you ever experienced a talking session with people that make us feel comfortable? What about people who make us feel uneasy? These got to do with the length of time that they look at us or with how long they hold our gaze as they speak.

Most Liars Look You in the Eye

Many people associate lying with looking away. Approximately 30% of the liars constantly looked away when they lie while the other 70% of the liars maintained strong eye contact with their victim, assuming they were less likely to get caught if they did the opposite of what people expected. They were right.

The Sideways Glance

The Sideways Glance is used to communicate interest, uncertainty or hostility. When it is combined with slightly raised eyebrows or a smile, it communicates interest and is frequently used as a courtship signal, mostly by women. If it is clustered with down-turned eyebrows, furrowed brow or the corners of the mouth down-turned, it signals a suspicious, hostile or critical attitude.