i usually look at the forehead in such cases,the hiarline,and i still wonder if they looking at me when im talking to them,ya cant tell
was a dude like that in school people picking on alot,he was smart friendly guy but still got bothered becuase he literally looked right thru u it seemed, and could bug ya to talk to him for any length of time,
he got slapped alot untill he kicked one dudes ass for it and they stopped .

alot is Judged by the look in your eye