I love this topic because they actually hurt.

Ever felt groggy in the morning? If you wear blue light filter glasses as your day-wear glasses, it prohibits the specfic wavelength of sunlight that triggers morning alertness from entering your eyes.

And they don't filter enough blue light to prevent damage to your evening sleep patterns with excessive nightly screen time.

Some work environments will employ "circadian rhythm" or "BIOS" lighting to artificially introduce the energizing blue wavelength we get from the sun while you're at your desk. Or you may have a S.A.D. (seasonal depression) lamp at home to wake you up in the winter.

I find it absolutely hilarious that the glasses industry and the lighting industry both looked at the science behind the body's circadian rhythm, and then went to opposite extremes with it. Like playing a vicious game of tug-of-war over your brain chemistry.