What humans do lack is any peripheral vision. If they can change that, life would be interesting. The parrot to the left here < has that problem solved, however, he has other issues.
That's the difference between being a predator or prey animal. Predators need to have good stereo vision, be able to track moving targets, and the sharpest vision and most visual processing occurring in the center of their field to be a successful hunter.
Prey OTOH need close to omnidirectional vision, and the ability to spot movement anywhere in their field of view. Detail isn't too important, nor is stereo range-finding.
And that's why predators usually have both eyes forward-facing, and prey almost always have one eye on each side of their head. Just by looking at the eye placement of any given animal you can usually tell which is more important to them, defense or offense.
Raptors take that pretty far into the extreme - owls can't even move their eyes, which remain fixed forward-facing, and hawks have incredibly sharp forward vision. Then look at most insects with their low resolution compound eyes that cover 360 around, up 90, and down sometimes all the way to 90 as well. Some insects can detect motion in absolutely every direction at once. (now you know why you can't sneak up on that fly with your newspaper)
(I wish the IMG tag would get fixed)
http://farm4.static.flickr.com/3281/3085177911_0dc4c6d520.jpg 
