I think that's true. When I take more than 200 mg of MDMA I start to hallucinate stuff "inside" the eye wiggles, but if I straighten my eyes out they go away. Usually I just trance out for a while and when I focus again I realize that that person I thought I was talking to is really a painting on the wall or a person on TV. With MDA, I haven't personally experienced it, but I've talked to people who saw full on patterns on the walls with their eyes open and their mind focused, which is more psychedelic.