After reading some chapters of a book "Understanding Body Language".

This book is written by Jane Lyle, it tells a lot of body language. I read the page 26 to find some examples related to my work.

Eyes
If we don't want to see something, we normally close our eyes and remain in symbolic ignorance of what we're looking at. There is a simple reaction that is shutting the eyes for a second or two, and putting our hands over our eyes completely to exclude the outside world from vision.

Desmond Morris identified 4 cut-off signals. These are 'Shifty Eye', the 'Stuttering Eye', the 'Evasive Eye' and the 'Stammering Eye'. All of these signals make the onlooker feel uncomfortable.

Shifty Eye: Rapid glancing while talking, as if searching for the exit or a more interesting companion.

The stuttering eye: it seems as if the eyes cannot decide whether to open or close their lids, which produces a disconcerting form of nervous flicker.

The evasive eye: Staring sightlessly into the air, or down at the ground, the person seems unable to meet your gaze for any length of time.

The stammering eye: a lengthy blink,lasting longer than normal.

I will continue reading the book and find more parts of the body about language.