"Focus overlay" as hallucinations make sense. Some focus overlay may be astral bleedthrough, some focus overlay may be subconscious bleedthrough.

I've begun to think that human beings really never stop dreaming. Maybe our subconscious minds are always playing games of association with images. Some "crazy" people may just be people who are dreaming while awake all the time, with their subconscious superimposing dream images over what they see with their physical eyes. Some "crazy" people may actually just be seeing the astral, but what if it's more a mix of both -- they're seeing subjective dream images and the etheric and the astral, just like we do when we project.