Basically for effect, and for you to feel what happens when you eliminate a primory sense what causes the problem. The head is at the top of the body for a reason, and its not so you take a better photo, different animal types have radar in different positions in their head for a reason, also different size attributes for doing so to alert the brain. I dont know about other speices, but our eyes are the only sense that doesnt go directly to the brain, and both eyes dont see the same thing. Eliminate the eyes and make the muscle neurons adapt to speed qiucker, thats one way. there are others md hit on one, non movement of the oral cavety, the head.