Earlier quoted context omitted.
I've always had visual glows when I close my eyes. Not eye floaters, I only see those when my eyes are open. When I close my eye, I usually see an outline of bright/dark somewhat matching what I last saw, but desaturated and splotchy. If I keep my eyes close, the patches kinda drift around. It's kinda fun to watch sometimes but I get bored eventually open my eyes. I've always assumed its my eyes just adjusting to the…
I always remember the term 'eidetic' and always think I am misremembering the correct term, but it is "eidetic imagery" I am searching for. To me this refers to the phenomenon of seeing above-threshold-of-perception patterns or motions, such as lava-like swirling. As you say, such things can be interesting for a time. This following link discusses the phenomenon in terms of phosphenes: https://www.huffpost.com/entry/…
I can voluntarily cause a burst of those color patterns by, after closing my eyes, relaxing all my facial muscles and letting my eyes go unfocused. Works best when trying to fall asleep, so I can imagine people unintentionally doing the same during, say, meditation and correlating it with their spiritual leader.