PuckMercury wrote:
your eyes get the image "burned" in for lack of a better phrase - like a CRT left at "Press Control Alt Delete to log on" for too long.
Seriously, just like when you look at the sun.
Good call, I looked around using that thinking and I found something. The color does get "burned in", but it's the opposite color that remains. By looking at the inverse colors, and then switching to BW photo, you see the real colors then. See
Opponent Process at Wikipedia if you are interested. Thanks to PuckMercury for pointing me in the right direction.