this post was submitted on 15 Jan 2025
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Wasn't it confirmed recently to be total nonsense and nothing to do with circadian rhythms? Compared to the sun a phone puts out very little light and the circadian rhythm only respond to slow changes in light, not on and off in a short time.
It's more about your phone keeping your mind active instead of relaxing and going to sleep. But if you already can't sleep because your mind is churning on something, a bit of distraction might actually help. It's very personal and not a clear cut rule on who has trouble sleeping from phone use or when to put down the phone.
So it isn't like using your phone before sleeping will never have an effect on how well you get to sleep. But it has nothing to do with blue light or circadian rhythms.
I think what was proven wrong was the significance of the color of light. The original study had people using iPads at like maximum brightness.
The migraine afterwards would probably keep me awake, too.