Light shouldn't be the enemy. FL-41 can help.
If you live with migraines or chronic light sensitivity, you've probably tried everything. FL-41 is the only lens tint clinically studied to filter the wavelengths that trigger attacks — and it's built into every Sunclip frame.
What Is FL-41?
FL-41 is a rose-amber tint originally developed in the 1990s by researchers studying photosensitive epilepsy. Clinical studies found it effective at filtering the blue-green light spectrum (480–520nm) most associated with migraine attacks, fluorescent light sensitivity, and photophobia.
It's not a fashion tint. It's not a blue-light filter. It's a precision wavelength filter — and the research backs it up.
Who Is FL-41 For?
FL-41 glasses are recommended for people who experience:
- Migraines triggered or worsened by light
- Photophobia or chronic light sensitivity
- Discomfort under fluorescent or LED lighting
- Vestibular migraines or visual snow syndrome
- Blepharospasm or other light-sensitive conditions
FL-41 vs. Other Tints
Blue-light glasses, generic rose tints, and sunglasses are not the same as FL-41. The specific wavelength filtration profile is what makes FL-41 clinically effective — and what sets Sunclip apart.
Read: FL-41 vs. Blue-Light Glasses — What's the Difference? →
How to Choose Your Frames
Aviator, cat-eye, rectangle, or overfit — the right frame depends on your environment, face shape, and whether you wear prescription glasses. Here's how to choose.
Frequently Asked Questions
Will FL-41 glasses work for me?
FL-41 has been clinically studied for migraine and light sensitivity relief. While individual results vary, many people with photophobia and migraines report significant improvement. We recommend consulting your healthcare provider for personalized advice.
Can I wear FL-41 glasses indoors and outdoors?
Yes. Unlike sunglasses, FL-41 is designed for all-day wear in both indoor and outdoor environments, including under fluorescent and LED lighting.
Do FL-41 glasses replace my prescription glasses?
Sunclip FL-41 glasses are available as non-prescription frames. If you require vision correction, speak with your optometrist about FL-41 lens options. Our Overfit Rx styles are designed to wear directly over your existing prescription glasses.
How is Sunclip different from other FL-41 brands?
Every Sunclip frame uses an authentic FL-41 tint — not a generic rose tint or blue-light filter. We combine clinically studied wavelength filtration with premium frame design built for all-day comfort.
Individual results may vary. Consult your healthcare provider for personalized advice.
Shop by Style
Browse our full FL-41 collection by style to find the right frame for you.