Can someone post some links to studies? I remember reading that your screen brightness should be close to the ambient light level, and it does help my eyes when

Can someone post some links to studies? I remember reading that your screen brightness should be close to the ambient light level, and it does help my eyes when I do that adjustment, but I don't know why. White screen = brighter screen, so dark screens at night would make a less-bright screen, and vice versa, which seems to back up the theory.