Answers

2014-04-26T11:36:19+05:30
We have two eyes to make correct prediction of distance between the object and to look everything in 3 dimensional.
1 5 1
2014-04-26T11:38:18+05:30
So that we can see more clearly and can see more
 on side.
1 5 1
Badddd... that can be also reason but thats not the main reson
then bye i am not your friend and i am going to report you if you don't mark me as best
This what your friendship... that worked for not more then an hour :-P