Removing screen time is new science and has not been widely propagated.
In fact, I am not even sure if it’s been published. I have been working with one of the Australian leaders in concussion (Perth based emergency doctor) who strongly advocates this, at most its 12 to 18 months old
Ditto this from the University of Pittsburgh Medical cEnter Sports Medicine concussion clinic. (They're one of the leading groups in the US on this topic, very likely because they treat the Pittsburgh Steelers. :-). Reducing screen time and other highly-stimulating visual inputs was key.
