it, is that the yellow tint helps in “improving visual efficiency, endurance, and recovery while combating eye fatigue during extended hours of gaming”. This is not to say the plain whites don't do anything. More on that late - See more at: http://www.techtree.com/content/features/4026/gunnar-eyewear-hype-reality.html#sthash.Wo9emIE9.dpuf