actually those were allosaurios, but they trough velociraptor sounds cooler
Deinonychus actually, because allosaurus is almost T-Rex size.
P.S. The binocular vision of T-Rex might have been a leftover from his previous and smaller versions (like Allosaurus) and size is easier to change than eye orientation.
AFAIK T-Rex not seeing still objects does not exist outside Jurassic Park (just like many other "scientific facts" in the film). In fact, the only mentions I can find about this in scientific articles is to bust the JP myth. The book mumbled something about the mixing of frog DNA being the reason for this (which makes no sense either because even frogs can see inanimate objects and have depth of focus), the film simply states it as a "natural" characteristic of a T-Rex. Of course, even human eye detects movement easier than something not moving, but that hardly matters when something is almost in your face.
link