I heard this very often and am always quite curious about it, as I cant relate. Whenever I imagine something it's a mix of abstract, foggy stuff and vivid clear

I heard this very often and am always quite curious about it, as I cant relate. Whenever I imagine something it's a mix of abstract, foggy stuff and vivid clear images. I don't "see" them, I think/dream them like replaying a visual input without involving the eyes.