As lotekk and storm said: you use one eye for accurate aiming but 2 in CQB. but in CQB you DO use the sights so in inf there would have to be 2 aimmodes, one with 1 eye open and one with both open, wich, i think will be more work then it's worth. And I think it may look wrong because IRL your eyes's views overlap and when foccusing through iron sights you would see double a little but you brain can filter that. blahblah, you probably don't understand what i mean but some things you just can not simulate. Aiming in CQB is mostly instinctive, you see a target and just automatically put your sights on it. Not being able to feel where your gun is pointing will always make CQB more difficult in a computer simulation than in RL. I think we must not make it unrealistically difficult by adding things that may be realistic but one does automatically in RL.