>>1559483There is only one kinda true thing about the blue light, and that is that our body uses it (among other) to set the sleep cycle to awake.
Could be because blue is energetically high, could be because the sky is blue, who knows.
THAT'S why the screens offer a blue light filter, it's supposed to activate in the evening to reduce the amount of blue light keeping you awake.
That#s the ONLY time where you would wear one of those glasses too.
The blue light is only a small piece though, much more likely is the simple act of navigating the phone and light per se, for which the body could not prepare.
People lie in bed with their phones and even 2 minutes before wanting to sleep use concentration on their phone, getting also light in their eyes. And then they wonder why they can't sleep. Yup, it's the blue light...
Over the day you definitely don't need a blue light filter, and all those effects as if the light was made out of tiny knives are utter nonsense.