1 May 2018 #91
Blue light is from the energetic side of the scale of visible light and the next one in that direction is UV. It has short wavelengths. It also comes from the sun and fluro lights which have been used for ever in schools including russia. None of this is a problem.
As it is also coming out of phones and screens which we hold closer to our face and spend hours on it is now a problem for sure. No doubt about that. My phone has a blue light filter, i have it set on 50%. This is a more realistic level our eyes can take no problem.