Hallucinations or Ghosts

I'm continuing with my TED Talks on Netflix.  The batch of talks I'm watching now is on psychology.  Specifically, I watched the talk given by Dr. Oliver Sacks about Charles Bonnet Syndrome.

This is a syndrome where people who are losing their sight or hearing start "hallucinating" sights or sounds- whichever sense they're losing.

While I have a lot of scientific background and I completely believe all of the functional MRI studies that show that different parts of the brain are firing during these "hallucinations", I think that science might be drawing an incorrect conclusion about what is going on.

Has it ever occurred to these doctors that perhaps these are not hallucinations, but that people are really seeing these things?

Has it ever occurred to these doctors that perhaps there's more to be seen that what can be seen in the visual spectrum or heard through the common decibel range with the ears and that just MAYBE the aging changes in these organs allows other sensations to come through to the brain THAT ARE COMPLETELY REAL?

Perhaps there are "ghosts" or at least different entities around us that we can't see with "normal functioning" eyes, but that we can see when they lose their ability to function "normally".

I think it's pretty short-sighted (ha ha) of these doctors and scientists to that that the items aren't there.  With all of the discovers in dark matter and subatomic particles and non-Newtonian physics, why would you EVER assume that we know everything there is to know about sight?  or about the world that we can "see"?

There's so much that we CAN'T see, that perhaps we ought to pay these people more heed about what they do see- perhaps they're seeing what's in spaces we can't.