Avoid blue light and screens 1–2 hrs before sleep
The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
Avoid blue light and screens 1–2 hrs before sleep
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Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
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blue light-blocking glasses are 👍
I've shown people how to do that on Instagram in the past you can go to color filters and adjust yeah you can make your phone very orange but I A lot of times when I'm even using my computer during the day I will use um Iris and I'll put it in sleep mode all day just to decrease the amount of blue light coming off my computer
now I don't have any objective data on how much the blue light coming from my computer affects my eyes but I know that at night I sleep better when I'm not exposed to it at all
They're on their devices too late. They're having blue light exposure. They're not using blue light blocking glasses.
10 minutes of bright outdoor light within the first hour of waking anchors the circadian phase and improves sleep onset that night.
Morning sunlight exposure shifts the cortisol awakening response forward, improving daytime alertness.
Long-term morning sunlight reduces age-related macular degeneration risk.
Sleep regularity predicts all-cause mortality more strongly than sleep duration.
Tracking deep sleep on a wearable accurately reflects EEG-measured slow-wave sleep.
Caffeine has a half-life long enough that consumption after 2pm measurably degrades deep sleep in slow metabolizers.