Board Thread:Versus Debates/@comment-26636534-20180205153025/@comment-4080775-20180303040825

It does matter if his body is isn't there. If his body isn't there, how can true eye contact be established? He might as well be attempting to use Genjutsu on something without chakra. Basically Obito is teleporting himself to another dimension and leaving a shell of his former self in the default dimension. You can still see him, but you cant interact with him in any way, shape or form until either he returns, or you use his other eye to teleport to the current space he is in and harm him.

If you cant touch him, what makes you think light reflecting off your eye will touch him? Everything uses a medium to transfer from place to place, even Genjutsu, whether it be sound, vibration, chakra, the earth, light or even space surrounding you.