All digital screens T.V or P.C emit an electromagnetic radiation called Blue Light.
Thanks to blue light filter coating lens, the harmful portion of blue light is cut while allowing the good portion of blue light to pass through.
You can actually see the protection at work as blue light is being reflected off the lens. Due to the reduced amount of blue light entering the eyes, contrasts are improved by reducing screen brightness, flickering and eye fatigue to provide a strain-free visual experience while providing the most complete protection.
Finally, the Blue Block lens is 100% UVA&UVB protective.