Down yes, off no.
It is sort of like turning down the volume from 120 decibels to 100 decibels.
It is an improvement but damage is still being done.
A paper page emits no blue light. And it does not waver or blink.
Oddly it requires less concentration to read a paper page then it does the same thing on a lit screen. Which is why you will see people looking up from reading something on paper and keeping their head down when looking at a screen. They are "locked in" to what is on the screen because it takes more effort to go in and out.
I guess their SmartWall told them to do so.
If only they were not so boring!