by FlipMode » February 1st, 2012, 1:02 am
Yes they do, its a little thing called sub concious. Same thing that lets us see in our dreams even though our eyes are shut =P
However, it depends on a couple of factors. One of those being, whether or not the person had sight to begin with. Its all based on the mind, so the longer one goes without sight, the less visually detailed their dream will be. If they never did have sight, there is still a chance that their mind will be capable of forming an image through the senses it picks up, such as sound, feel, smell etc.
I mean they obviously do know that, for example the sky is blue.
So I mean, in short, obviously they do, its common sense.