We may account it established that the bands are after-images.
The bands persist as after-images while new ones are being generated.
But these do not vanish; they persist in various ways, as after-images, concepts, memory.
The matter of after-images, probably because of their short duration, is of no criminalistic importance.
After-images, or recrudescent memories (often memories of things not consciously noted).
In their simplest spontaneous form they are the cerebral sequel of external vision, just as after-images are its entoptic sequel.
As stated elsewhere, we may have illusions of after-images as well as of the original images.
The main visual phenomena are those of color-mixture, after-images, adaptation, and contrast.
The haze was just its disgustingly tawny evening self with black spots that were only after-images.
After-images or recrudescent memories coming up from the subconscious strata to which they had fallen.