I've been trying to find some information about this just recently, and having a problem finding anything about it. It started recently, I've noticed, that after I doze off and wake up, there is a shade of blue to everything, and after "experimenting" with it somewhat today, the blue color becomes more darker, not as faint. It doesn't last long, as the other colors do fade back in. The longest it has stayed before it cleared up was up to a minute.
There isn't any discomfort, pain, or anything of the such.. just seeing things in a different color than what I seen them as before.
So I am also wondering, is this directly related to the eye itself, or how the brain is reading/seeing it. Do the certain receptors start responding to light before others, or are certain colors picked up first?
Any idea on this would be great, or any links, and suggestions.