There's actually another name for what you see during the day. Hypnogogic imagery is what you may see before falling asleep, but when you are awake it is called hypnopompic imagery. (I looked it up so it's spelled right.)

EDIT:....then again, I could be wrong. The hypnopompic imagery seems more associated with spiritual stuff. (*wonders where O'nus and his big brain are.)

EDIT2: Well, I looked it up again:
These dreams involve hallucinations either before (hypnogogic) or after a dream (hypnopompic). These may not just involve hallucinations - the dreamer may hear things, smell things, and even taste things. Such hallucinations usually last for just seconds but may continue for longer.[/b]