I have sunken/hollowed skin under my eyes and will be getting fillers. But the skin under the eyes is also somewhat darker (dark eye circles), which I want to deal with/improve before getting the fillers. I understand that the sunkeness makes the color seem darker, but the doctors confirmed the skin itself is also a bit dark. I read that the best solution to this is mixing retin-a with the Neocutis lumiere cream. Can you please verify the validity of it? I have no underlying medical conditions.