Axon Optics vs FL-41

FL-41 lenses were developed in 1991 to help people with sensitivity to fluorescent lights.¹ Now, they are often used to help people find relief from light sensitivity and migraine.

Axon Optics was co-founded by a leading neuro-ophthalmologist who pioneered many of the original FL-41 studies. He has led our efforts over the years as we have studied, tested, and upgraded the original FL-41 to create a superior lens for light sensitivity and migraine. And you can only get this superior lens from us. You can find our glasses at

"I have tried multiple brands of FL41 glasses. So far, these are the best made comfortable, effective and helpful in indoor lighting situations of the 3 brands I’ve tried. (I also really like how they look on me.)"

-Elizabeth M. from New York

Some light is good! Axon Optics lens reduce the painful kind and let the good light pass through.

Axon lets more green light pass than FL-41

Thankfully, we know more now than we did in 1991.

Since then, researchers — including our founder — have discovered that lenses should block bad light (blue and amber) and let good light pass through (green).²

Green light actually helps reduce photophobia and headache severity.³ However, FL-41 lenses block 80% of green light.⁴ Why block light that could help you?

We've fine tuned our lenses to block blue and amber light, but let in more of the green light. This is why our lenses work so well, and it's what makes them stand out from FL-41.


"Regardless of which frames you get, in my opinion Axon Optics makes the best FL-41 glasses on the market, and I am very pleased with my purchase."

-Esteban S. from New Hampshire

Axon lenses are tested and consistent. You can't say that about "FL-41."

Axon are more consistent than FL-41

What you actually get when you purchase FL-41 lenses varies by supplier. Actually, it varies a lot.

One study found wide variations in the quality, lens color, spectral characteristics, and optical densities of lenses purchased from different optical shops and laboratories.⁵ So when you buy FL-41, you're taking a risk.

With Axon Optics, you get the same quality, consistency, and color every time.  This is because we test our lenses (and most others too). FL-41 suppliers don't test their lenses. In fact, some companies claim they're selling you FL-41 when they're just selling colored lenses. They aren't the same!

“Best indoor FL41 I’ve tried: I suffered a severe concussion four years ago and have had terrible daily migraines and intense light sensitivity – especially to fluorescent lights – ever since. I have tried multiple brands of FL41 glasses. So far, these are the best made, comfortable, effective and helpful in indoor lighting situations of the 3 brands I’ve tried. (I also really like how they look on me) I am going to have a pair made up with my prescription because I’m so happy.”

-Elizabeth M. 

Axon Optics users report a reduction in migraine and light sensitivity.

Axon Optics decreases migraine days and light sensitivity

Due to the variances and lack of testing with FL-41, you can’t really be sure they’ll work for you.

By contrast, Axon Optics customers experience 33% decrease in their migraine days, according to clinically validated surveys. And 85% reduce the impact of light sensitivity.

Screenshot - 2021-11-03T001617.625

"After doing a lot of research I came upon the FL-41 lens and specifically the Axon Optics website. Compared to other companies the choice of lenses are very stylish and the proprietary Spectrashield FL-41 lens has a softer, more attractive tint."

-Ann L. from Connecticut

Darker isn't better. In fact, darker could make things worse.

Axon has less discoloration than FL-41

Notice the hues of the lenses above. You'll see the Axon Optics lenses have a lighter hue. Why is this so important?

Because wearing dark lenses indoors can actually make you more light sensitive.⁶ Think about when you walk outside after watching a matinee movie – the sun feels extra bright. Ouch!

Since our lenses let in more light overall (the good, green light) than many FL-41 lenses, you can avoid becoming more light sensitive over time.

“I’ve tried other brands of [lenses] to help with my photophobia, migraines, and cyber sickness. So far, the Axon Optics are the best. The lighter shade of indoor lenses work better for me because the darker orange gives me eyestrain in addition to the above afflictions, and who needs that?”

–Linda from Mississippi

With the majority of Axon users reporting reduced impact of photosensitivity and migraine, there’s no need to block more light. Just block the right kinds!

Axon lenses don't reflect the painful light back into your sensitive eyes

Axon reflects 18x less glare than FL-41

Don't you hate it when fluorescent light reflects off your glasses into your eyes?

This glare can aggravate your light sensitivity, kind of defeating the purpose you bought them for. Fortunately, Axon Optics lenses reflect less than 0.2% percent of the light due to our advanced, premium anti-glare coatings.

Generic FL41 lenses may not have any anti-reflective coatings, and can reflect much more light than Axon Optics.

“After reading up on each one I decided on Axon optics because they are the original migraine glasses, the tint isn't as dark/orange, and the shape of the glasses will suit me better.”

-Angela from Michigan

Axon Optics is the original

Axon Optics has pioneered lenses for migraine and light sensitivity, but we don't stop there. Our updated science, our ongoing research, and our ties to the medical community make all the difference.


Founding Scientific Team

In 2011, Axon was founded by Dr. Bradley Katz, a neuro-ophthalmologist and photosensitivity scientist at the world-renowned Moran Eye Center at the University of Utah Hospital and Dr. Steve Blair, a photonics researcher at the University of Utah.


Ongoing Research

Over the last decade, our founders have published many academic articles on light sensitivity and migraine.⁵ Dr. Katz has treated thousands of photosensitive patients.


Ongoing Development

The continuing research and guidance of our expert founders helps us continue to refine our lenses. We do everything we do to improve the lives of people with light sensitivity and migraine.

“[I] ultimately chose Axon due to its Moran Eye Center connection.”

-Karen from Montana

Axon funds new technologies to improve your migraine-fighting tools.

Funds new technologies

Because we use some of our profits to fund research, we've been able to create cutting-edge advancements. These include light-adaptive lenses for light sensitivity, and contact lenses with the same light-blocking precision tint of our lenses. We're the only company in the world with this technology.

“I have twice bought headache glasses and they were just the wrong tint. I had bought Axon before, non prescription, and my eyes instantly relax when I put them on.”

-Juana from New Jersey

Insist on the best in light sensitivity lenses

High-quality, high fashion frames

Many generic FL-41 lenses come with cheap “gas station” frames. Axon Optics will never sell these. We’re obsessed with providing you with sturdy, comfortable, and lightweight frames that match the quality of our lenses.

Oh, and they look great on you, too!


“I have tried a few FL-41 lenses here, nothing has helped my migraines like Axon.”

-Louis from Ambsterdam

Everything You Need, Without the Risk

  • 60-day money back
  • Free shipping
  • Free returns
  • Hard case & cleaning cloth



Want to know the entire history of FL-41 and migraine glasses? See our comprehensive guide here.

  1. Good, P A, et al. “The Use of Tinted Glasses in Childhood Migraine.” Headache, U.S. National Library of Medicine, Sept. 1991,
  2. Hoggan, Ryan N, et al. “Thin-Film Optical Notch Filter Spectacle Coatings for the Treatment of Migraine and Photophobia.” Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia, U.S. National Library of Medicine, June 2016,
  3. Noseda R, Bernstein CA, Nir R-R, et al. Migraine photophobia originating in cone-driven retinal pathways. Brain. 2016;139(Pt 7):1971-1986.
  4. Lens spectrum measured on 08/02/21 on BPI Spectrometer. Charts below.
  5. University of Utah research project. 2011Comparison of Different FL-41 Lenses From Multiple Vendors
  6. Katz BJ, Digre KB. Diagnosis, pathophysiology, and treatment of photophobia. Surv Ophthalmol. 2016;61(4):466-477.

Lens Spectrum Comparison

Y axis – light transmission 

X axis – light wavelength  

Spectrum measured on 08/02/20 on BPI Spectrometer



Axon reduces the blue and orange wavelengths which have been shown to reduce the symptoms of migraine and photophobia.

Green light has been shown to be beneficial to migraineurs which is why green therapeutic lights are now on the market.



FL-41 reduces the blue light, but at a much higher ratio than the orange.

The majority of green light is blocked with these lenses.

Testing of multiple fl-41 lenses from the University of Utah

An early research project from the University of Utah Medical Center evaluated whether patients were getting the same benefit from therapeutic lenses (or lenses with FL-41 tint) from different vendors. Surprisingly, the study found wide variations in the quality, lens color, spectral characteristics, and optical densities of lenses purchased from different optical shops and laboratories.

Each line on the graph below represents FL-41 lenses from 5 different vendors. The light shows how much light passes through the lens at different light wavelengths. As you can see, they vary significantly.

FL41 graph


The original FL-41 that was used in the early studies, such as the one conducted by Dr. Good in 1991, looked like this. It was used to combat fluorescent lighting. The FL-41 used in the 1991 study is very dark and blocks the good green light. The tint was developed to block certain wavelengths from fluorescent light, but now we know so much more.

Screenshot - 2021-11-03T003248.816