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Im asking about how to find out what they think when they look to a certain direction when you do the non verbal stare.
(Example: Does down and to the right mean anything?Or down to the left,up to the right or left?,etc....)
Is there anything on this?

Yes, it does tell you what part of their brain they are accessing but that will vary based on the type of question you ask her.
I wouldn't worry about eye movements all that much there are SO MANY other non verbal ques that you can pick up on to know if she's interested or not that it's almost not even fair for her anyways.