Why block.
The science is simple. Most people just haven't heard it yet. Here's what blue light does to your body — and why blocking it after dark changes everything.
Your brain can't tell the difference
Blue light shows up in sunlight and in every screen you own. After dark your brain gets the noon signal and keeps you switched on — alert, cortisol up, sleep hormones held back. It doesn't know it's 11pm. It just reacts to the light it's given.
Melatonin only starts in the dark
Your body makes melatonin in response to darkness — specifically the absence of blue wavelengths. While screens are on, that cue never comes. Cut the blue after sunset and your body gets the signal. Melatonin climbs. Sleep follows.
Cortisol is meant to fall at night
In a normal cycle cortisol peaks in the morning and tapers through the day. Evening screens keep it propped up when it should be dropping — that's the tired-but-wired feeling. Blocking the light lets it fall the way it's meant to.
Deep sleep does the real work
Muscle repair, metabolism, memory, immune function, mood — all of it runs on deep sleep, and deep sleep needs real melatonin and low cortisol to show up. Better input, better output. Every single night.
The tint is the filter
Most blue light glasses on the market use clear or barely-tinted lenses. They look normal, they're easy to wear, and they block almost nothing — usually under 20%. The amber in BLOCKERS ONE is there for a reason: it targets the exact 380–500nm band that suppresses melatonin. A clear lens can't reach it. The colour isn't a look. It's the mechanism.
Your phone emits the same light at 11pm as it does at 11am.
Your brain takes that signal literally. It can't tell a screen from the sun — so after dark it keeps you wired when it should be winding you down.
Daylight → awake
In a natural cycle, blue light peaks during the day. Cortisol is high, you're alert, melatonin stays switched off. Exactly how it should be at noon.
- Cortisol high & falling through the day
- Melatonin suppressed — you feel awake
- Body clock aligned with the sun
Midnight → still "noon"
Screens emit that same daytime blue after dark. Your brain reacts as if it's midday — cortisol stays elevated, melatonin never starts, and sleep refuses to land.
- Cortisol stuck high when it should drop
- Melatonin blocked — wired but tired
- You lie there, still scrolling
Now you know.
You've got the science. Give your body the signal it's been missing.
See the glasses — €19