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Ceiling lights and screens tell your body it is still daytime, right up until you switch off. The Sleep lens removes 99% of the blue light from everything in the room, so your body knows it is evening.
Chosen by Tallon Griekspoor, Besfort Zeneli and Frida Maanum.
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Lens
Frame
Colour
Applied automatically at checkout. No code needed.
FRAME DIMENSIONS
Ion: 47-19-150 (Fits most head sizes. May feel slightly tight initially for larger heads).
Ceres: 47-19-150 (Fits most head sizes. May feel large for smaller heads).
Helios: 44-19-150 (Feels tighter. Best suited for small to medium head sizes).
Acetate adjusts to the shape of your head over time as you wear them. If they feel tight at first, the frame can be stretched out slightly.
FRAME MATERIAL
Acetate
A premium, plant-based material made from renewable cotton and wood pulp. It’s hypoallergenic, lightweight and durable — and holds rich, glossy colour far better than cheap injection-moulded plastic. It’s the material of choice for high-end eyewear.
LENS MATERIAL
Polycarbonate
Lightweight, ultra-durable, and impact-resistant. Polycarbonate lenses are up to 30% thinner and significantly lighter than standard plastic lenses, making them ideal for all-day comfort. They offer built-in 100% UV protection and high shatter resistance.
EVENING STARTS AT THE EYE
There is an exact moment every evening when the body is ready to switch. The problem is that screens and indoor lighting delay it. Blue and green-adjacent wavelengths hit the retina and keep the brain in daytime mode — melatonin is suppressed, cortical arousal stays elevated and the autonomic nervous system resists the parasympathetic shift. Sleep is postponed. This is not a habit issue. It is physiology.
HEVO manages the signal at the source. The lens absorbs 99% of blue light and blocks 100% of UV within tested ranges, with strong attenuation of transmission between 500 and 560 nanometres. That is sufficient to give the brain the night signal it needs: melanopic stimulation drops, wakefulness-driving input is removed and the warmer wavelengths that remain allow normal vision without interfering with wind-down.
The frame is built for consistent performance in evening environments. The full-size lenses reduce peripheral light entry from mixed indoor sources. Acetate temples hold alignment stable during extended wear. Optical-grade polycarbonate at 2.0 mm delivers uniform spectral blocking across the entire visual field — not just straight ahead. Filtering values are laboratory verified and the glasses meet international optical standards.
Put them on from dusk to bedtime. That is all it takes to stop working against your own recovery.
MELATONIN DOES NOT RELEASE ON ITS OWN
The body produces melatonin when the eye's photoreceptors stop signalling daylight. The cells that control this — intrinsically photosensitive retinal ganglion cells — respond primarily to blue and green-adjacent light and signal directly to the suprachiasmatic nucleus. As long as those wavelengths are active, release is suppressed. Screens and indoor LED lighting are strong enough to hold the system in daytime mode well into the evening. Repeated over time, this strains nocturnal recovery and destabilises hormonal and metabolic regulation.
HEVO breaks that signal at the eye. The red lens absorbs 99% of blue light and strongly attenuates the adjacent green spectrum that drives circadian activation. When melanopic stimulation drops, the brain permits evening physiology — neural activation decreases, the autonomic nervous system shifts toward parasympathetic recovery and the body begins its nocturnal sequence without competing signals.
The result shows in how you fall asleep and how you wake up. Sleep onset is faster when circadian timing is not being worked against. Sleep becomes more restorative when the system does not need to compensate for delayed release. This is not a placebo effect from darker lenses — it is specificity. The lens removes the wavelengths that interfere. Everything else is left intact.
SLEEP QUALITY IS AN INPUT, NOT AN OUTCOME
Most people treat sleep as something that either happens or does not. In reality, the quality of the night is determined by what happens in the hours before it. Artificial light in the evening inhibits melatonin production, keeps cortical arousal elevated and delays the point at which the body can begin repairing tissue, regulating hormones and restoring energy. The effect is cumulative. A delayed sleep onset one night compounds the previous one. Recovery does not fail dramatically — it erodes gradually.
HEVO addresses this at the only step that is actually controllable: light exposure before sleep. Through selective filtering of the wavelengths that drive circadian activation, the lens allows melatonin release to follow its natural curve. The body receives its signal on time. Sleep onset moves earlier. Sleep goes deeper and the body's repair sequences are more fully completed.
This is not about overhauling routines. It is about removing a specific obstacle. Evening screen use does not need to stop — but its circadian cost can be eliminated. HEVO is built for that: uniform spectral blocking, stable fit and verified filtering values that actually deliver what the lens promises. Better recovery does not begin in bed. It begins at the light.
When light wavelengths between 400 and 550 nanometers (blue and green spectrums) hit the eye, specialized photoreceptors called ipRGCs alert the suprachiasmatic nucleus—the central driver of your internal body clock.
This neural pathway halts melatonin release and pushes back your body's sleep schedule. Filtering out these specific wavelengths with red-tinted lenses blocks this disruption, allowing natural melatonin production to begin on time rather than being delayed by up to an hour and a half.
Sources
We offer free shipping on all glasses with 3-6 days delivery time. Delivery time vary depending on country. ReturnsWe offer 100 days return. Cost of return for EU orders is €9 and International orders is $20.
I can really recommend Hevo Sleep Lens! I sleep so well when I wear them in the evening. I've tried other evening glasses but none have worked as well. And thanks for the fantastic customer service!
MerleVerified customer · Translated from Swedish
I was sceptical about whether they would really improve my sleep, but after trying them for a few weeks I really feel a big difference. Good quality glasses and great service!
VictorVerified customer · Translated from Swedish
Really impressed. They filter out blue light and I notice a clear difference in both eye fatigue and sleep quality. Sit comfortably on the nose and feel well made. Highly recommended!
ArberVerified customer · Translated from Swedish
Really good-looking blue-light glasses with a clear effect! Definitely worth the price of about 1,000 SEK.
Love LindbergVerified customer · Translated from Swedish
Honestly first thinking they were expensive. But in the end lovely glasses, premium quality as expected.
FabioVerified customer
I work a lot and for long hours, which has meant putting up with a lot of tension aches and tired eyes. Not any more!
steven erixonVerified customer · Translated from Swedish
They work well, you fall asleep so much more easily. If you find it hard to fall asleep on time, buy these!
CarlJohanVerified customer · Translated from Swedish
Helped me with my headaches.
Tim RosendahlVerified customer · Translated from Swedish
Very happy with the glasses and the support I got, but above all the effect on my sleep and recovery. Highly recommended!
HugoVerified customer · Translated from Swedish
I spend a lot of time at the computer now that I'm studying. The glasses deliver not just in materials but in looks too. They feel solid and are worth the money. Most importantly, they've been so easy on my eyes. We chose the yellow lens since you can wear them all day.
Yudith HällstorpVerified customer · Translated from Swedish
Helps me sleep better and I wake up fresher with more energy during the day! Highly recommended!
Kasper BerndtssonVerified customer · Translated from Swedish
Bought one pair and ended up ordering several more. I'm very sensitive to blue light and these glasses were 10/10. And what customer service, it's rare to get help that fast.
FiskgubbenVerified customer · Translated from Swedish
I get tired in a different way and faster. I mostly use them with my phone in bed before sleeping, and in front of the TV. Colours look different, but you get used to it quickly. Plus the frames look good and fit perfectly.
FredrikVerified customer · Translated from Swedish
Makes a difference to deep sleep! Noticeably.
-hoppsansaVerified customer · Translated from Swedish
Really good service and quality.
Lukas PaulsenVerified customer · Translated from Swedish
Fast delivery, fantastic product. Also really quick help from the owner when we needed extra help with our order.
sebastian HånbergVerified customer · Translated from Swedish
Great stuff! And fast service!
Hassan HajoVerified customer · Translated from Swedish
Look good on and feel gentler for the shift into the evening.
Harrison Rodrigues LagosVerified customer · Translated from Swedish
Your body gets the signal that it's evening, so you get tired on time.
Keep the series, the phone and the lamps. The lens filters the light from everything you see.
Many customers say their eyes and head feel less strained by the afternoon.
Focus at the screen, Relax in the early evening and Sleep before bed.
Lamps and screens are full of the blue-green light your eyes read as daylight. That's why you can be tired on the couch and wide awake in bed.
Where the receptors that set your body clock are most sensitive. Blue-green light, exactly what the ceiling light, the TV and your phone give off.
Berson et al., Science, 2002
made no measurable difference to sleep in a Brigham Young University study. And the ceiling light and the TV stay exactly as bright.
Duraccio et al., Sleep Health, 2021
More sleep for people with sleep problems who wore blue-blocking glasses, compared with clear placebo glasses.
Shechter et al., Columbia University, 2018
Three lenses, one for each part of the day. Pick a lens and see exactly which light it stops.
99%of the light between 400 and 560 nm blocked
Your body finally gets the signal it has been used to for hundreds of thousands of years: that it's evening. Screens and lamps feel softer, and when you go to bed you don't lie there tossing and turning like usual.
Your body starts finding its rhythm. You notice you get tired at about the same time every evening, and mornings feel a little easier.
Focus Lens at the computer, Sleep Lens in the evening. Now you notice the difference most on the evenings you forget them, and sitting without them feels strange.
Sleep Lens 1–2 hours before bed, until lights out. Focus Lens at the screen during the day. Keep your phone, your series and your lamps as usual.
HEVO looks like a pair of normal glasses, not safety goggles. That's why they stay out on the table instead of in a drawer.
Cellulose acetate, made from wood and cotton cellulose.
Premium frames are made of acetate. It feels solid and comfortable on the skin, not like thin injection-moulded plastic.
Acetate can be adjusted with heat and settles to the shape of your head over time.
Focus Lens
Daytime, at the screen
Relax Lens
Early evening
Sleep Lens
1–2 h before bed
Night Shift, clear blue-light glasses and supplements are what most people try first. Here's how they compare.
HEVO
Night Shift, clear lenses, supplements
Tallon Griekspoor
Tennis, Dutch No. 1
”HEVO allows me to control the light for better sleep, recovery and performance.”
Ronja Savolainen
Ice hockey, Ottawa Charge and Finland
Frida Maanum
Football, Arsenal
Besfort Zeneli
Football, Union Saint-Gilloise
Adam Ollas-Mattson
Ice hockey, Färjestad BK
100 evenings.
Don't notice a difference? You get your money back. 96.4% keep theirs.
That's why it has been tested against placebo. In a Columbia University study (2018), people with sleep problems slept about 30 minutes longer on average with blue-blocking glasses than with clear placebo glasses.
And you test it yourself, for 100 evenings.
For you if you
Not for you if you
Night Shift changes the colour of the screen. The ceiling light, the TV and the rest of the room stay as they are. Sleep Lens filters 99% of the blue light from everything you see.
Yes, that's the point. You don't have to put your phone away or stop your series.
Focus for the screen during the day and Sleep for the evening is the most common pair. Relax suits the early evening.
Ion and Ceres (47-19-150) fit most heads. Helios (44-19-150) is tighter and suits small to medium heads. Acetate settles to the shape of your head over time.
You have 100 evenings. If winding down doesn't feel easier, send them back.
