The lateral field of vision is mainly used to detect motion while the central part is used for precise visual inspection. So you see, human vision is quite different from the view through a 50 mm lens.
While this would be dangerous in real life, having no peripheral vision in photography helps the photographer to focus attention on the intended subject by limiting the field of vision.
Humans see things in a certain way - we have a wide field of vision, and we can quickly focus on pretty much anything.
Having the other eye closed will just limit your field of vision. For example, you want to photograph a moving subject, such as an animal.
Because a wide-angle lens has a wider field of vision than the human eye, it can take in more of a topographical expanse. Consequently, the wide-angle lens is one of the preferred landscape camera lenses.
Centering
Positioning a image properly within the digital field of vision so that it is framed appropriately.
Keep your camera level and begin shooting at the bottom of your field of vision (with your main image as your central focal point). The next shot should include a 25 to 30% upwards overlap of the first frame.
A polarizing filter, or polarizer, for example, filters light as it angles further away from straight ahead, and as a result gives truer tones to objects in its field of vision - which really helps to take the glare off of sunny days.
Imagine a landscape with a flowering tree in front of a large scene. We see the tree as dominant in our field of vision, with everything else less sharply seen and definitely subordinate to what we've focused on.
" This is important for both safety and great photos — it simply means that you should keep your eye that's not at the viewfinder open to increase the likelihood that you'll see photo opportunities (or problems) in your field of vision, ...
The other type are sometimes called full frame or semi fisheyes and basically offer a cropped field of vision so you don't get the black areas at the corner of the picture. As a result they only cover 180 degrees of view on the diagonal.
Not to be too redundant with the gun analogies, but imagine how much easier it would be to shoot a target moving directly toward you than a target that you have to follow laterally across your field of vision.
 See also: Image, Camera, Photograph, Photography, Photographer
  
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