Paul Saladino· MD
do not look at your iPhone before you go to sleep because that is flickering.
Loading…
We can't find evidence that holds up here. Proponents are reasoning from mechanism or analogy rather than direct human data, and the most credible skeptics raise objections we can't dismiss.
do not look at your iPhone before you go to sleep because that is flickering.
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
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.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
So that at least personally, I am sensitive to both wavelength and pulse width modulation. So There's been studies with kids on the flicker. Mhm. It also draws us in. It's hard to look away from something that flickers. So I am sensitive and I think a lot of people are more sensitive to flickering light than we're aware of. So it's not just enough to be in to be avoid blue light before you go to sleep. I think that for most of us if we want the best sleep which is one of the most ergogenic substances we can have, good sleep, you also have to be aware of flicker which means if you are in your house, do not look at your iPhone before you go to sleep because that is flickering.
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.