My doctor: "To heal from a concussion, you should limit the amount of time you spend looking at a screen."

Well, I guess I'll just die then...

Yes. When I got a concussion I wouldn't look at screens or even read. I spent most of the first 24 hours directly after my injury in a dark bedroom. But I don't have permanent brain damage so it was worth it. Please, take care of your brain.

Limit to what?

Exactly.