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TheraSpecs® FL-41 Glasses

Learn how TheraSpecs FL-41 lenses provide protection and relief for migraine, headache, post-concussion syndrome, photophobia, and other symptoms triggered or worsened by light.

TheraSpecs® offers several lens options with the therapeutic FL-41 tint, which are great for photophobia associated with migraine, brain injuries, and other light-sensitive conditions. Research shows that TheraSpecs relieve painful light sensitivity and photophobia, reduce migraine attacks, and protect from artificial and natural light sources like fluorescents, LEDs, screens, and even sunlight. They work by targeting the wavelengths of light that can cause pain and other symptoms.1-4

TheraSpecs FL-Pro and FL-Blend Glasses with FL-41 Tint in Mercer Frame

FL-41 Lens Options for Light Sensitivity and Other Symptoms

TheraSpecs FL-41 Glasses Reviews

TheraSpecs FL-41 lenses have been delivering meaningful relief to our customers for more than a decade, and they just can't get enough of the life-changing impact our glasses offer. Here are some of the FL-41 glasses reviews that showcase their newfound relief and freedom.

What customers are saying

Jess wearing FL-Pro TheraSpecs glasses with FL-41 tint

"These are a special, high quality, FL-41 tint glasses. I specifically wear TheraSpecs because after tons of research and trial and error, I have found them to be the best in quality, value, effectiveness, customer care, and aesthetics."
-Jess B., New Hampshire, wearing FL-Pro (extra) lenses

Sean wearing FL-Pro TheraSpecs lenses with FL-41

"If I were to compare these TheraSpecs glasses to other blue light glasses, I would say it helped about 25-30% better, which is a game changer for me because I stare at a computer all day. And my eyes just honestly feel smooth."
-Sean P., Canada, wearing FL-Pro (extra) lenses

Tyler wearing outdoor FL-Sun sunglasses with FL-41 polarized tint

"I’ve been suffering from an eye condition for almost 7 years now called floaters...The only thing that really helps get me through and ignore the floaters is these nifty lil glasses from TheraSpecs. The relief the tinted outdoor lenses bring me compared to any other pair I’ve tried is incomparable. Not to mention they are pretty damn cool looking."
-Tyler, North Carolina, wearing FL-Sun lenses

See more TheraSpecs reviews ➜

Not sure which lens is right for you? Use our lens finder to answer a few questions and receive an instant recommendation!

Not All FL-41 Glasses Are Created Equal

The FL-41 tint is more than just a lens color. It is designed to target specific wavelengths of light (480-520nm) that research has shown to be the most harmful for photophobia and light-sensitive conditions.5 They filter more of this harmful light when compared with typical blue light glasses and other therapeutic eyewear too. As a result, glasses with FL-41 are a top recommendation by medical professionals for light sensitivity and other symptoms that are triggered or worsened by light.

TheraSpecs offers four FL-41 lens options to meet your needs, each of which are therapeutically-tinted and verified to block these triggering wavelengths.

TheraSpecs FL-Pro™ maximizes the filtering power of FL-41 to remove the most harmful wavelengths of light and protect you against computer and device screens, fluorescent lighting, LEDs and other artificial sources.
Shop FL-Pro Lenses ➜

TheraSpecs FL-Blend™ also uses FL-41 and balances the filtering of triggering light with a less noticeable tint to provide meaningful relief for symptoms brought on by artificial light.
Shop FL-Blend Lenses ➜

TheraSpecs Flex is the lightest FL-41 lens we offer and is designed for people with mild light sensitivity to screens and other artificial sources and/or those who need protection while driving at night.
Shop Flex Lenses ➜

TheraSpecs FL-Sun™ embraces the benefits of FL-41 by applying the tint to dark, polarized lenses that block more than 92% of the most harmful wavelengths.6 They tame bright sunlight and harsh glare, making them the best sunglasses you’ll own.
Shop FL-Sun Lenses ➜

Research shows that TheraSpecs:

  • Relieve painful light sensitivity and photophobia
  • Reduce migraines and headaches by up to 74 percent
  • Lessen other brain and eye symptoms triggered by light
  • Protect you from screens, fluorescent lights, LEDs, and all artificial light (FL-Pro and FL-Blend)
  • Protect you from sunlight and outdoor glare (FL-Sun)

Woman wearing TheraSpecs therapeutic glasses with FL-41 for relief

Designed for Maximum for Relief

TheraSpecs frames are designed specifically for people with light-sensitive disorders, such as migraine, post-concussion syndrome, and numerous others. Many styles effectively block light from above and the sides, and all TheraSpecs are as lightweight as possible and add flexibility to minimize pressure on already-sensitive heads. Prescription TheraSpecs can be created with any of our therapeutic tints, and custom frames—in any style you choose, including clip-ons—can also be fitted with TheraSpecs lenses.

How to Buy TheraSpecs FL-41 Tinted Glasses

TheraSpecs can be purchased quickly, easily, and securely through our online store. Whether you live in the US, UK, Australia, Canada or just about anywhere else in the world, we are able to get our FL-41 glasses right to your door. We even have a free shipping option for all US orders. In-stock pairs ship the same or next business day; custom orders take approximately three weeks.

60 Days for Returns and Exchanges

We can't wait for you to experience the benefits of our FL-41 tinted glasses and get back to what you love! If you don't absolutely love the relief of your TheraSpecs, we want you to know that we're here to help. You can reach out to us at any time with questions or if you need additional support in order to get the most out of your experience with our glasses.

We also encourage you to take full advantage of our return and exchange policy. If you want to try another frame or a different lens option, just reach out to our team within 60 days. We also accept returns for non-custom TheraSpecs as well.

Try them and see how they can help you or your loved one take control, stop fearing the light, and find relief!


1Good PA, Taylor RH, Mortimer MJ. “The use of tinted glasses in childhood migraine.” Headache. 1991 Sep;31(8):533-6

2Wilkins AJ, Wilkinson P. “A tint to reduce eye strain from fluorescent lighting? Preliminary observations.” Ophthalmic Physiol Opt. 1991 Apr;11(2):172-5.

3Blackburn MK, Lamb RD, Digre KB, Smith AG, Warner JE, McClane RW, Nandedkar SD, Langeberg WJ, Holubkov R, Katz BJ. “FL-41 tint improves blink frequency, light sensitivity, and functional limitations in patients with benign essential blepharospasm.” Ophthalmology. 2009 May;116(5):997-1001.

4Reyes N, Huang JJ, Choudhury A, et al. "FL-41 tint reduces activation of neural pathways of photophobia in patients with chronic ocular pain." American Journal of Ophthalmology. 2023. doi:10.1016/j.ajo.2023.12.004

5M. Tatsumoto, T. Eda, T. Ishikawa, M. Ayama, K. Hirata “Light of Intrinsically Photosensitive Retinal Ganglion Cell (ipRGC) Causing Migraine Headache Exacerbation.” IHC symposium OR3. 2013 June

6Visible light transmission by wavelength measured using f.luxometer software

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60-day return guarantee

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Free shipping on US orders

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