Green eyes – the water is green, grey. Does that mean the green eye pigment helps? The only reason you see the color I show in my pictures is because the strobe has compensated for the lack of red color underwater. It returns daylight colors to the otherwise green looking see. And then there is the matter of “red eye.” Light reflects off the retina of people and produces “red eye.” You knew that, right? So here you see the red eye. It looks orange to me. And here you don’t. So, see, it works. I love it when science works!