For me, the best way I can describe what it feels like for me is: I can imagine an apple and I get a feeling as if I was seeing it, but I don't actually see it. I don't see an image in front of me. I only feel like I'm seeing an image, and I have to focus pretty hard to see anything in detail, but I can still use it to, for example, try and manipulate something in 3D, or try to remember what I was doing on a given day by trying to walk back through a place. I don't know under what category that makes me fall under.