There is a great wright up on this over at www.blifaloo.com/  For example “Up and to the Left Indicates: Visually Constructed Images (Vc) If you asked someone to “Imagine a purple buffalo”, this would be the direction their eyes moved in while thinking about the question as they “Visually Constructed” a purple buffalo in their mind.”   Eye Movement and Direction & How it Can Reveal Truth or Lies