I have been experiencing this symptom since I was 19, I am 23 now. Only apparent in very low light conditions such as my bedroom when I am going to sleep. How I describe it is a black opaque shadow-like disc “pulsing” through my vision; starting from central vision and moving quickly throughout the periphery and disappearing if eyes left open more than a second. But will reappear if I keep my eyes closed longer than a second and then open them again. The “disc” is not perfectly circular but more ovoid in shape. This symptom is present in both eyes independently, however more apparent in the left.
I came across this page looking for people with similar symptoms and reading on some threads that it may be a side effect of macular degenerative scarring is unsettling to say the least, especially at my young age.
I have also been experiencing objects that stay “imprinted” in my vision longer than they seem like they should. As well as distinct “afterimages” when looking at a moving light in a dark room. For example moving my brightly lit iPhone screen across my field of vision, almost like the tail end of a “normal” light trail is slowed downtown lagged behind. Wondering if any of you have experienced this symptom as well or if these symptoms may be caused by something else.
Thanks