Ayo Glasses Review image

We’ve tried out the AYO light therapy glasses and put them through rigorous scientific testing, and in this review, we’ll share with you everything we’ve found, and what our thoughts are on this device!

  • Learn More

The aim of light therapy products is to align your circadian rhythm and alleviate the symptoms of insomnia, depression, and seasonal affective disorder.

The AYO Glasses

The AYO glasses are a fantastic, lightweight, easy-to-use circadian tool that stems from a successful 2015 Indiegogo campaign in which Novalogy LTD raised $370,000 to start their project!

ayo prototype photo
Original concept art for the AYO glasses. Learn more about AYO here.

The AYO available today has come a long way since then, so let’s unbox them and see what’s inside!

view of all the ayo package contents
Inside the box you find the hard carrying case, a soft pouch, a charging cable, and of course the glasses themselves. Buy AYO

The hard carrying case that comes with these is a nice touch since one of the main use cases for light therapy glasses is jet lag optimization during travel.

It also comes with a soft pouch and a USB-C charging cable, which I’m very happy about.


  • Weight: 32g
  • Warranty (world): 1 year
  • Warranty (EU): 2 years
  • LED Color: Turquoise Blue
  • Session time: 20 minutes
  • Battery life: 9.5 sessions
  • Charge time: 90 minutes
  • Guarantee: 60 Days

Here’s our video review if that’s more of your style!

Let’s talk about what it’s like to use the AYO glasses.

Using the AYO Glasses

Picking these up for the first time, I was amazed at how light they were!

Weighing in at just 32g, they’re only slightly heavier than a normal pair of glasses.

I have a pair of blue blocking glasses that weigh 28g, so I was pretty astounded at how light they were able to make these.

On top of that, the batteries and other components are stored in the rear of the glasses, which helps keep weight off the nose section, further improving comfort.

ayo glasses on a scale
close up of ayo light therapy glasses nose piece
The adjustable nosepiece.

There’s a silicon nose piece that can be adjusted to fit your nose and move the glasses either farther away or closer to your eyes.

Ideally, you want to fit these so that they’re just above your eyes, this way you can maximize the light hitting your eyes while keeping your view unobstructed.

There’s a quick start guide in the box that illustrates this perfectly:

ayo adjustment instructions
If you ask me though the guy on the bottom is the one who’s too high. HAH!

I found the fit to be just about perfect. I whipped my head around as hard as I could and they didn’t budge, so I’m pretty comfortable saying you could run and exercise in these, worry-free.

Using these glasses really could not be any easier, you just open them up and they’ll automatically turn on! No need to fiddle around with an app or anything like that.

There’s also this nice subtle warm-up period that makes it a bit more pleasant to use than if the lights just went straight to 100% right away.

Now, there is only one brightness setting with the AYO. After having used it for a while, I’m completely fine with this.

The light output is well-calibrated and effective as you’ll soon see…

How Effective is the AYO?

The AYO utilizes 4 LEDs, two above each eye, whose light is bounced off a cleverly designed frosted visor.

side bottom view of light reflection visor on ayo glasses
The frosted visor creates a nice glare-free experience. Buy AYO

This gives the light a nice dispersion pattern on the eyes, without being too glaring.

ayo light therapy glasses LED dispersion pattern
Light output in total darkness to show the areas it lights up. Buy AYO

Testing the AYO

To determine the effectiveness of the AYO LEDs, we outfitted a mannequin head with a lab-grade spectrometer!

front view of ayo light therapy glasses on test mannequin head
I’m very proud of my spectrometer-equipped mannequin head. His name is Henry.

Henry gives us the ability to take lab-grade measurements at eye level!

How cool!

Well, I think it’s cool anyway.

So we took a bunch of readings and here’s what we found:

The light emitted from AYO’s LEDs is a narrowband turquoise blue, peaking at around 463 nm.

spectral power distribution graph of ayo light therapy glasses
Spectral power distribution graph of AYO LEDs

AYO has an advantage over some other light therapy glasses because of the LEDs they’ve chosen.

It turns out that 463 nm is right about smack dab in the middle of the melanopic bell curve.

the spectrum of ayo glasses compared with a melanopic bell curve
AYO’s light compared to the sensitivity range of the ipRGC cells in the eye.

This was no accident! AYO’s developers chose these LEDs specifically for their efficiency in activating the melanopically sensitive cells in the eye.

This is probably why many people seem to find the light from this device more pleasant than devices like the Luminette 3 which uses a white light.

The AYO simply doesn’t have to be as bright to have a similar circadian impact.

Circadian Calculations

We used the data we gathered from Henry and ran it through the LHRC’s circadian stimulus calculator to find out what kind of effect this light can have.

Here’s what we got:

Our Measurements

  • Brightness: 36-95 lux
  • Power Output: 56-148 µW/cm2
  • Circadian Light: 528-1430 CLA
  • Circadian Stimulus (30 min): 0.425-0.576
  • Melanopic EDI: 326-862

This varies depending on facial structure and placement on the nose, but these readings should apply to most.

According to the Circadian Stimulus standard, a CS score of >0.3 should be met during morning and daytime hours.

While the CS calculator doesn’t allow us to see the CS of a 20-minute session with AYO. We can see that a 30-minute session gives us a CS of 0.425 to 0.576, which is quite a bit higher than 0.3, so we can infer that 20 minutes is sufficient to hit this limit.

The melanopic-EDI metric adopted by the WELL standard, requires 250 lux m-EDI is recommended for humans during the day, and the AYO exceeds this by quite a bit!

All in all, the AYO glasses easily exceed all current circadian standards.

Using the AYO with Glasses

The AYO will be less effective with glasses on, no doubt about that.

Many glasses today block some amount of blue light, and the AYO LEDs will be further from your eyes due to

To give you an idea of how glasses can impact the effectiveness of the AYO, here are a couple of side shots of Henry with and without glasses.

ayo light therapy glasses worn with and without glasses
Henry with and without his glasses. Buy AYO

Fret not! The AYO is still effective at this range, but it’s a gradient. It will certainly be more effective without the glasses.

Circadian Data with Glasses

  • Brightness: 27 lux
  • Power Output: 44 µW/cm2
  • Circadian Light: 416 CLA
  • Circadian Stimulus (30 min): 0.380
  • Melanopic EDI: 259

As you can see, the CS score is getting a bit low with glasses on.

If you’re looking to shift your melatonin onset to earlier in the evening, have trouble falling asleep, or are battling jetlag, you may want to consider keeping the glasses off until you’re done using the AYO.

The AYO Circadian App

The original AYO glasses used Bluetooth to connect with their phone app, where the user then had to select from options to use the headband.

AYO just recently released their new app, which is still being updated as we speak.

The idea is to provide the user with notifications and guidance to optimize their circadian rhythm based on sleep and activity data.

Things like food, light, coffee, exercise, and sleep recommendations will be offered.

ayo app home page screenshot

They’re currently working on Apple Health and Google Fit integration which I’ve been told should be ready by Q2 2023.

This will allow them to recommend certain habits and AYO usage based on your sleep and activity data.

So right now the app is fairly basic, but they’ve laid the foundation for a nice application that is still being actively worked on, so I look forward to seeing what they come up with in the future.

Clinical Trials

So far, AYO has completed 2 clinical trials and is currently working on 10 others!

I was able to locate the two trials that have used the AYO, so let’s go over those for those of you who like this kind of stuff.

The first study involved 42 submarine personnel who were either assigned to a control group or a group who received 40 minutes of AYO light in the morning as well as two hours of blue-blocking glasses at night.

Just about everyone who used the glasses saw a significant improvement in energy and wakefulness. While most of the complaints centered around difficulty seeing in dimly lit environments.

I can attest to this! If you’re in a very dimly lit environment, the AYO is certainly bright enough to make it difficult to make out your surroundings.

The second study involved 30 undergraduate students who were split up into two groups, one used the AYO for 30 minutes every morning for 3 weeks, and the other was a dim light control group.

Sleep problems and sleep quality were both significantly better in the AYO group.

Our Thoughts

Overall I think the AYO is a great little device!

It’s amazingly lightweight and comfortable, doesn’t budge during morning workouts, and the light output is effective without being too glaring.

Both Malissa and I have been using them every morning before work, and we’ve had no complaints!

ayo light therapy glasses sticking out of soft pouch
We love our AYOs, and really couldn’t be happier with the product. Buy AYO

During testing, I even wore them for a whole hour (3 total sessions) and still didn’t experience any discomfort, which surprised me!

If you’re looking for a pair of light therapy glasses for jetlag optimization, insomnia, seasonal affective disorder, or just sleep optimization in general. The AYO is a great option!

AYO Light Therapy Glasses

ayo light therapy glasses product photo


  • Provides high circadian activation with low lux
  • Very lightweight and comfortable
  • 60-day money-back guarantee
  • The carrying case is very nice!


  • The app is being worked on but not up to its full potential.
  • Not as effective as the Luminette on its high setting

  • Learn more

Now check out our guide on 19 Ways to Align Your Circadian Rhythm for more tips on how to get better sleep!

Leave a Reply

Your email address will not be published. Required fields are marked *