I'm a little dubious, on general principles. Plus my optometrist just suggested this new "blue-blocker" option for my glasses, it stops blue-laser light dead, a very impressive demonstration, but it paradoxically doesn't remove any blue from what you're looking at. Must be a very fine-tuned filter that just blocks one wavelength of blue. He talked on and on about the effects of blue light on sleep. Quite a hard-sell. And they want $140 for that option. Sounds like blue snake-oil to me.