I'm aphantasic. I dream normally, seeing all sorts of imagery. I have accidentally had a couple lucid dreams in my lifetime, which got me interested in the methods to trigger them intentionally, all of which have failed. The Wake Back to Bed (WBTB) method has been especially frustrating, because I'll see my usual nothing when my eyes are closed, but then for the very briefest instant I see a dream image that immediat…
My best successes would occur after drinking a cup of coffee and immediately taking a nap before a study session.
It was great, I "learned how to fly" and could "morph" my dream into whichever direction I wanted.
One thing stuck out though: whenever I would try and focus on something, I would see a black dot enter the center of my vision. The more I tried to focus, the larger it got. If I focused on an area attentively enough, such that the black circle became all encompassing, I would wake up.
After a few times of this, I could start to notice the focus, and then sort of relax out of it, and thus continue the dream.
It feels like the black dot is my real-life vision coming into focus, and "winning" over the visual aspects of the dream. It's always continuous from black dot to eyes opening.
I rarely lucid dream now, but I've noticed a similar thing happen whenever I try to read text - the black dot appears and I wake up.
Wish I still had unlimited time to go back to sleep!