Comment by calewis

I have spent the last year building sleep tech and I have read 100's of papers on the subject, been to conferences and spent lots of time with academics and experts on the subject of sleep. Screen time matters massively. It really matters for children and every single piece of evidence, bar this poorly written study (two questions), say so. It's a real issue for adults too, and blue light issue aside, the disturbance of your wind down routine is a massive health issue that needs to be adressed. It affects not only how you fall asleep (the marker for which people judge sleep quality) but also staying asleep and the quality of it (a far more important measure).

(Also if anyone is building sleep apps/tech I'm looking for work)