There's a similar phenomenon called contralateral neglect (or one of various other names), where after brain damage to one hemisphere of their brain, a person t

There's a similar phenomenon called contralateral neglect (or one of various other names), where after brain damage to one hemisphere of their brain, a person tends to ignore things on the opposite side. The effect is sometimes in retinal coordinates (e.g. only scan objects in one half of the field of view), sometimes in object coordinates (e.g. eat only one half of a plate of food), and sometimes in egocentric coordinates (e.g. not shave one half of their face). This seems to be similar, but different condition. Contralateral neglect is a problem of attention: they can see the things they ignore, they just won't spontaneously pay attention to them. This is a problem of perception, where they tried to pay attention to their eye, but perceived it as not being there. I don't have an easy explanation for how this effect occurs.