Why Screens Destroy Your Sleep (And the Fix Isn't Blue-Light Glasses)
Blue light gets all the blame — but the real reason screens wreck your sleep is more interesting, and the fix is something most people overlook entirely.
Read articleSleep advice is everywhere and most of it is noise. What actually has evidence behind it is unglamorous: consistent times, a bed that your brain associates with sleep, and cutting the late-day caffeine, alcohol, and screen sessions that quietly sabotage the night. The problem is that almost everyone believes their own habits are fine.
This self-test adapts the Sleep Hygiene Index, a validated research questionnaire, into ten yes/no statements. It won't diagnose anything — it will show you which specific behaviors are most likely working against your sleep, which is the part you can change.
Short, science-based learning modules explain what actually regulates sleep — circadian rhythm, sleep pressure, arousal — and which popular tips are myths.
Turn the findings from your self-test into small, concrete evening habits — one at a time, so they actually stick.
Daily check-ins show whether your sleep is responding, so you keep what works and drop what doesn't.
Answer for a typical week — not your best night, not the one disastrous Sunday. If a statement is true more often than not, that's a yes.
0/10 answered
0/10
Educational self-assessment adapted from the Sleep Hygiene Index (Mastin, Bryson & Corwyn, 2006). Not a medical diagnosis — persistent sleep problems deserve a conversation with a doctor.
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The term "sleep hygiene" comes from clinical research: a set of behaviors — consistent schedule, limited caffeine and alcohol, a dark and quiet room, a bed reserved for sleep — that reliably correlate with better sleep quality. The Sleep Hygiene Index (Mastin, Bryson & Corwyn, 2006) is the standard questionnaire researchers use to measure them, and it's what this self-test adapts. The evidence that these behaviors matter is solid; a 2015 review in Sleep Medicine Reviews (Irish et al.) found meaningful effects for schedule regularity, stimulant timing, and the sleep environment in the general population.
Honesty requires the second half: for diagnosed chronic insomnia, sleep hygiene alone is not an effective treatment — clinical guidelines are explicit that cognitive behavioral therapy for insomnia (CBT-I) is the first-line approach, and hygiene education is only a supporting piece. So read your score for what it is: a map of which everyday behaviors are working against you. If you fix them and your sleep recovers, they were the problem. If months of solid habits change nothing, that's a signal to bring in a professional, not to buy another blue-light gadget.
Each yes counts one point; ten points are possible. The bands (0-2, 3-4, 5-7, 8-10) mirror how the Sleep Hygiene Index distinguishes good from poor sleep hygiene: more yes answers means more behaviors that research links to worse sleep quality. The score measures habits, not sleep itself — a short sleeper with perfect habits and a long sleeper with terrible ones can both be surprised.
No. It's an educational self-assessment of sleep-related behaviors. It cannot detect sleep disorders like insomnia, sleep apnea, or restless legs syndrome. If you snore heavily, wake up gasping, or have slept badly for more than three months despite reasonable habits, talk to a doctor — those need proper evaluation, and effective treatments exist.
The honest answer is: less through "blue light" than marketing suggests, and more through behavior. The melatonin effect of evening screen light is real but modest in most studies. The bigger, better-documented problems are displacement — the phone quietly eating an hour of your sleep window — and arousal, because feeds and messages keep your brain engaged when it should be winding down. That's why the test asks whether the phone is in your bed, not whether you own one.
Because it anchors your circadian rhythm. Shifting your sleep window by hours on weekends produces what researchers call social jetlag — your body lives in two time zones every single week. A stable wake time (even after a bad night) is the single intervention sleep researchers most consistently recommend, ahead of anything you can buy.
Alcohol is a sedative, so it genuinely shortens the time to fall asleep — that part is not an illusion. The cost comes later: it fragments the second half of the night, suppresses REM sleep, and worsens snoring and apnea. You trade faster sleep onset for worse sleep quality, which is why it counts as a yes on this test.
Change one thing, not everything. Pick the yes answer that occurs most nights, replace it for two weeks, and watch what happens — that's a real experiment with a sample size that matters: you. The Unwire app is built around exactly this loop: understand the mechanism, change one habit, track whether it moves the needle.