Bring back your natural rhythm.
Bring back your natural rhythm.

Blue Light Blocking Glasses

Bring back your natural rhythm.

Three lenses. Each built with a purpose.

One problem. Three intensities. Whether it's screen strain, winding down or getting to sleep — each lens filters exactly the amount of blue light that moment demands.

Sleep Lens

Your signal to wind down. Filters 99% of the light that keeps your body alert after sunset. Put them on before bed — your natural rhythm takes it from there.

Blue Light Blocking 99%
Best For Melatonin & Sleep
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The science behind the shift.

After sunset, screens and LEDs keep flooding your eyes with blue light. Your brain reads it as daylight — suppressing melatonin and keeping you wired when you should be winding down.

100% exposure blue light
Suppressed melatonin
Light reaching your eyes after sunset
380nm460nm530nm600nm700nm
Bättre kvällar börjar med bättre ljus.

How it works

Your body runs on light.

Your circadian rhythm — your internal clock — uses light to decide when you're alert and when you recover. Blue light signals daytime. Remove it after sunset and melatonin rises on schedule. That's the window HEVO protects.

Precision-filtered for the wavelengths that matter.

HEVO lenses target 450–550nm — the exact range proven to suppress melatonin. Optical-grade lenses in three intensities, calibrated for different moments of your life.

99% Sleep lens
97% Relax lens
84% Focus lens

Your evening, redesigned

Natural melatonin
Natural melatoninRestore your melatonin production
Aligned circadian rhythm
Aligned circadian rhythmTells your body when it is time to sleep
Less strain
Less strainNo more headaches & eye strain

Your questions answered

  • Night Shift only adjusts your screen. It doesn't touch the LED ceiling light above you, the lamp next to the couch, or the TV across the room. After sunset, blue light comes from everywhere — not just your phone. HEVO filters everything that reaches your eyes, not just one screen.
  • Most blue light glasses use clear lenses that filter a small fraction of what matters. HEVO's Sleep Lens blocks 99% of the wavelengths that suppress melatonin — the ones between 400 and 550nm. It's a completely different category of lens. You'll see it the moment you put them on.
  • the tint shifts colors. That's how you know it's actually working — if the lens looks clear, it isn't blocking much. Most people adjust within a few minutes and stop noticing. You're wearing these for the last 1-2 hours of your evening, not all day.
  • You can. Two hours of no screens, plus dimming all the lights in your home, would have a similar effect. But most people aren't going to do that. HEVO lets you keep your evening — read, watch something, scroll — without the biological cost. It's the realistic version of "just avoid screens.
  • Each lens is designed for a different part of your day. Sleep Lens for the evening — blocks 99% and signals your body to wind down. Focus Lens for screen-heavy days — takes the edge off without changing how you see. Relax Lens for the hours in between. Most people start with Sleep and go from there.