FL-41 is a lens tint that has been shown to reduce the impact of migraine attacks in clinical studies. But what does FL-41 tint look like? Are all FL-41 glasses the same? The answer is a resounding no.
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. Even the color of the lens ranges from rust, to purple, to hot pink.
Where Did FL-41 Originate From?
The FL-41 has a long and complex history. The technology has been in development since the 1980s and began at the University of Cambridge. Researchers were seeking a solution for individuals who were bothered by fluorescent lights. This was the original FL-41 tint, but it was quite different from what we have today. Dr. Peter Good, a neurophysiologist at Birmingham and Midland Eye Centre, read Wilkins’ research and saw an opportunity for additional applications of the FL-41 tint. This set off a chain of events that led to the precision tint for photophobia and migraine glasses that we have today.
In early 1990 Dr. Kathleen Digre of the University of Utah began recommending the FL-41 tint to some of her patients. In 1998, Axon’s own Dr. Bradley Katz, also of the University of Utah, was impressed with his colleague’s, Dr. Digre, success in using the tint to treat light sensitive patients. He began offering the tint to his own patients who suffered with migraine and some showed significant improvement. Fast forward to today and Dr. Katz has been instrumental in updating the lens design, increasing its effectiveness. The FL-41 tint has undergone several improvements and the numbers speak for themselves. It works for many who have migraine or are light sensitive.
How Are Axon Lenses Different?
The graph shows the level of variation when using generic FL-41 tint. Axon Optics brand name SpectraShield is clinically shown to be more effective and more consistent than the generic. Here are some of the differences you’ll see when you take a closer look:
- Lens Testing: We’ve tested our proprietary Axon lenses with over 500 people using clinically validated surveys. We found that nearly 90% of these people experienced a decrease in light sensitivity and migraine. On average the impact of light sensitivity was reduced by 38%. Migraine days reduced by 24%.
- Lens Coatings: Axon applies over 10 premium coatings on each side of its lenses to reduce glare, scratches, and smudges. This is a $100-$150 value if purchasing a similar coating through your optical shop. The Axon lens coating has less than 0.5 reflectance which is crazy low!
- More Good Light: You don’t want to wear dark lenses inside as you’ll dark adapt your eyes — think how painful it is to come out of a Movie Matinee into bright sunlight. Axon lenses let 20-70% more good light into your eye than generic lenses that have been released after Axon launched.
- Continued Research: Axon Optics was founded by a neuro-ophthalmologist, photonics researcher, and optical entrepreneur. My partner, Dr. Katz, has treated literally thousands of patients with light sensitivity and/or migraine. We use profits from Axon Optics to fund additional research for new products related to migraine and light sensitivity.
- Correct Color: Generic lenses are red, rust, purple, rose, orange, green, etc. It can be difficult to know what you are getting out there, which is why we’ve actually tested our lenses as described above.
- Extras: You receive an eyeglass case, microfiber pouch, and a 1-year warranty. All non-prescription frames have a 100% money-back guarantee and a no-questions-asked return policy within 30 days. Feel free to try them out.
- You can see hundreds of user experiences for insight into these lenses. If you really want to dig in, here is a long, but relevant history on the use of tinted lenses for migraine and light sensitivity.
How Should I Choose A Therapeutic Lens?
Look at the research and consider the source. Axon Optics was founded by researchers at the University of Utah. One of the founders, Dr. Bradley Katz, is a neuro-ophthalmologist who has worked with thousands of patients. He has been recommending and perfecting therapeutic eyeglasses for patients with light sensitivity for over 15 years.
The Axon lenses, called Spectrashield FL-41™, have been used by tens of thousands of people and have been shown to reduce the impact of migraine in over 90% of users. Our SpectraShield FL-41™lens is proprietary, and has been fine-tuned over the last 20 years many times by Dr. Katz. Each lens comes with premium coatings that block glare and prevent finger smudges and scratches.
Here is some feedback from an optical shop that is recommending Axon Eyewear: “I did a quick in-office test of [various vendors of FL-41]. Your tint won, especially with the office people who suffer from migraine headaches.”
Conor writes “I was recommended Fl-41 lenses, by my General Practitioner to treat my Blepharospasm and recurring monthly migraines. I have to be honest, I was not expecting the effect I’ve been getting. Light change no longer has any/ to very little impact on my eyes whether it’s UV or LED. As for my migraines, I usually go through a 6 hour ordeal, starting with dull eye pain that turns into full blown severe left hemisphere cranial pain, into the night, causing me to be sick. They don’t fully end the migraine but they minimize the symptoms, and the fact that they can deter it, is a true life changer.
The first time putting these glasses on was at work during a migraine with nausea. Literally within a second or two the nausea was gone along with the sharp pain portion of the migraine. After 35 years of fighting migraines I’m still finding it hard to believe these work as well as they do. I realize that everyone’s different, but if your one of the lucky ones where these FL-41 lenses work, they are pretty amazing.”
Try SpectraShield Lenses
Don’t choose generic lenses. Not all FL-41 lenses are created equal. Get the trusted name in therapeutic eyewear. Check out our stylish frames now at our shop.