There is a very interesting East Indian Neuroscientist that takes difficult cases, and I am truly sorry I don't remember his name. But I saw a demonstration of the "body map" that exists in an area of our brain somewhat across the top, and it is bilateral, there is a map for each side of the body.
This Doctor helps people deal with phantom pain from lost limbs by using a mirror box, that helps people re-establish conscious contact with lost limbs that feel pain. What happens (as I recall), is that the body map registers the loss and pain, and can't let go of it because the part is no longer there to communicate with. So the mirror box helps to establish contact with the body part in the map on the opposite side of the brain and the dialogue is established that erases the pain symptoms. This does work, at least in the case I watched.
As far as seeing from behind the eyes, we all see from behind the eyes, and we really do not "see", what we "see". Everything we see is strictly interpreted by the brain. For instance, we can't see straight lines, or tall buildings that conform to the ideation of symmetry and perspective. We see though bi-ocular fish eye lenses, and the world is really bowed in our true vision. We make up every rectilinear scenario. That is why the city is so stressing, and the country is relaxing. We don't have to work as hard to see nature, and it is in the relaxation of western standards of visual measurement, we find some relaxation. At least that is one of the components of leisure.
There have been all kinds of interesting experiments with human vision. One group put glasses on students for a week that made the world seem upside down. Within one week, the glasses didn't do that any more. When the glasses were removed then the world was upside down with natural vision, until the effect was reversed in a few days. Our perceptual skills are extremely varied, fluid, and individual.