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

Blue Light Blocking Glasses

Bring back your natural rhythm.

Three lenses

Three lenses. Each built with a purpose.

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

Blue light blocking
The effect

What you will experience

01

Evening calm

The hour before bed stops feeling switched-on. Your screens wind you down instead of waking you up.

02

Faster sleep

Time to fall asleep drops within the first week. Not sedation — an absence of the thing keeping you up.

03

Clearer focus

Morning attention holds longer. The sharp, blue light that normally causes the strain is blocked.

The effect

What you will experience

01

Evening calm

The hour before bed stops feeling switched-on. Your screens wind you down instead of waking you up.

02

Faster sleep

Time to fall asleep drops within the first week. Not sedation — an absence of the thing keeping you up.

03

Clearer focus

Morning attention holds longer. The sharp, blue light that normally causes the strain is blocked.

Proven by athletes

Real evenings. Measured.

Three lenses. One rhythm. Worn across ninety days by people whose nights actually matter — and measured to see the effect.

Tallon Griekspoor

Holland

Sleep score
91
Optimal
HEVO breakpoint
86
87
83
92
94
89
Before After

HEVO allow me to control the light for better sleep, recovery and performance.

#1 tennis player in Holland

Ronja Savolainen

Finland

Sleep score
92
Optimal
HEVO breakpoint
84
85
79
93
90
96
Before After

From what my Oura ring shows I fall asleep faster and enters deep sleep almost immediately!

Hockey player in Ottawa Charge and Finland

Jérémy Branger

France

Sleep score
89
Optimal
HEVO breakpoint
85
79
81
87
86
92
Before After

HEVO have helped me wind down and fall asleep faster. The natural, calm feeling at night is fantastic.

Personal trainer

Average 90-day wearer data. Self-reported from wearables.

Bättre kvällar börjar med bättre ljus.
99% Blocked
450–550 Range · nm

The science behind the shift

HEVO collapses the cold peaks. One warm tail remains — the wavelengths your body reads as evening.

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.