A window into what the Mind is doing.
This is the perspective when looking at a person in front of you.
Eye movement in themselves does not mean deception. It is a tool to see the accessing of different parts of your brain to verbalize a memory or understanding of a concept.
The brain is different for everyone. This diagram is a rough rule of thumb to use. Because the Brain does not adhere to the rules of man but of nature....and we all have seen the Platypus.