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Crystal | FL-41 Migraine Relief Glasses

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Crystal | FL-41 Migraine Relief Glasses

Crystal | FL-41 Migraine Relief Glasses

OKNO — Specialized Light Therapy Eyewear

FL-41
Migraine Relief
Glasses

Therapeutic-grade lenses engineered to filter the specific light wavelengths most commonly linked to migraines, photophobia, and light-triggered headaches.

Photophobia Relief
Migraine Support
Post-Concussion
Digital Eye Strain
Indoor & Outdoor
What are FL-41 lenses? FL-41 is a specialized tint applied to lenses, scientifically proven to block specific wavelengths of light that trigger eye pain, dizziness, and headaches. These lenses are widely used as a therapeutic tool for people managing photophobia, post-concussion syndrome, and migraine relief.
The Science

Why FL-41 Works

Blue-Green Light Blocking These lenses filter out a significant portion of blue and green light — specifically in the 480–520 nm range — which are the most common wavelengths to trigger light sensitivity, eye pain, and headaches.
Soothes Fluorescent & Screen Glare Originally developed by researchers to mitigate the harsh, flickering glare of fluorescent lights in office settings and from computer screens — some of the most persistent everyday triggers for photosensitive individuals.
Reduces Symptom Frequency Clinical studies have shown that FL-41 filters can significantly reduce the frequency and severity of migraines in people who experience light-triggered episodes.

380 nm 500 nm 700 nm
▲ Targeted filtering zone: 480–520 nm
Clinical Evidence

What Studies Have Found

Clinical studies examining FL-41 filters have reported meaningful improvements in migraine frequency and light-triggered discomfort for photosensitive individuals.

74%
fewer migraine attacks reported in studies
76%
improvement in light-triggered discomfort
80%+
reduced overall headache impact reported

Results vary by individual. These figures are based on observational clinical studies involving FL-41 lens filters.

Who It's For

Conditions It May Help With

Chronic Migraines May help reduce discomfort from light-triggered migraine episodes during everyday activities.
Photophobia (Light Sensitivity) Designed to ease persistent sensitivity to bright or artificial light sources.
Post-Concussion Syndrome Widely used as supportive eyewear for those experiencing light sensitivity following a concussion.
Digital Eye Strain Helps reduce discomfort from prolonged screen exposure, LED lighting, and fluorescent environments.
Everyday Use

When to Wear Them

Designed for all-day comfort — suitable for both indoor and outdoor environments.


During screen time & computer use

Under fluorescent & LED lighting

In bright sunlight & outdoor glare

In offices & indoor workspaces
Independently Certified

Internationally Tested & Certified

Every lens is independently tested. These lenses have passed all major international eyewear safety standards.

EN ISO 12312-1:2022
European International Eye Protector Standard
CERTIFIED
ANSI Z80.3:2018
American National Standard for Nonprescription Eyewear
CERTIFIED
AS/NZS 1067.1:2016
Australian & New Zealand Sun Protective Eyewear Standard
CERTIFIED
Product Details

Specifications

Lens tint Red FL-41 therapeutic tint
Filter zone Blue-green light band (480–520 nm)
Frame Unisex, ultra-lightweight
Suitable for Indoor & outdoor, daytime use
Tint note Shade may vary slightly from product images due to lighting and production variation

Block the Trigger.
Feel the Relief.

Unlike ordinary blue-light glasses, FL-41 lenses are a clinically recognised therapeutic tint — engineered to selectively filter the wavelengths that matter most for migraine and light-sensitivity sufferers.

Dispatch within 5 working days from order date.
Select Custom Made Ships in 4 Days
From $6.23

Original: $17.80

-65%
Crystal | FL-41 Migraine Relief Glasses—

$17.80

$6.23

Product Information

Shipping & Returns

Description

OKNO — Specialized Light Therapy Eyewear

FL-41
Migraine Relief
Glasses

Therapeutic-grade lenses engineered to filter the specific light wavelengths most commonly linked to migraines, photophobia, and light-triggered headaches.

Photophobia Relief
Migraine Support
Post-Concussion
Digital Eye Strain
Indoor & Outdoor
What are FL-41 lenses? FL-41 is a specialized tint applied to lenses, scientifically proven to block specific wavelengths of light that trigger eye pain, dizziness, and headaches. These lenses are widely used as a therapeutic tool for people managing photophobia, post-concussion syndrome, and migraine relief.
The Science

Why FL-41 Works

Blue-Green Light Blocking These lenses filter out a significant portion of blue and green light — specifically in the 480–520 nm range — which are the most common wavelengths to trigger light sensitivity, eye pain, and headaches.
Soothes Fluorescent & Screen Glare Originally developed by researchers to mitigate the harsh, flickering glare of fluorescent lights in office settings and from computer screens — some of the most persistent everyday triggers for photosensitive individuals.
Reduces Symptom Frequency Clinical studies have shown that FL-41 filters can significantly reduce the frequency and severity of migraines in people who experience light-triggered episodes.

380 nm 500 nm 700 nm
▲ Targeted filtering zone: 480–520 nm
Clinical Evidence

What Studies Have Found

Clinical studies examining FL-41 filters have reported meaningful improvements in migraine frequency and light-triggered discomfort for photosensitive individuals.

74%
fewer migraine attacks reported in studies
76%
improvement in light-triggered discomfort
80%+
reduced overall headache impact reported

Results vary by individual. These figures are based on observational clinical studies involving FL-41 lens filters.

Who It's For

Conditions It May Help With

Chronic Migraines May help reduce discomfort from light-triggered migraine episodes during everyday activities.
Photophobia (Light Sensitivity) Designed to ease persistent sensitivity to bright or artificial light sources.
Post-Concussion Syndrome Widely used as supportive eyewear for those experiencing light sensitivity following a concussion.
Digital Eye Strain Helps reduce discomfort from prolonged screen exposure, LED lighting, and fluorescent environments.
Everyday Use

When to Wear Them

Designed for all-day comfort — suitable for both indoor and outdoor environments.


During screen time & computer use

Under fluorescent & LED lighting

In bright sunlight & outdoor glare

In offices & indoor workspaces
Independently Certified

Internationally Tested & Certified

Every lens is independently tested. These lenses have passed all major international eyewear safety standards.

EN ISO 12312-1:2022
European International Eye Protector Standard
CERTIFIED
ANSI Z80.3:2018
American National Standard for Nonprescription Eyewear
CERTIFIED
AS/NZS 1067.1:2016
Australian & New Zealand Sun Protective Eyewear Standard
CERTIFIED
Product Details

Specifications

Lens tint Red FL-41 therapeutic tint
Filter zone Blue-green light band (480–520 nm)
Frame Unisex, ultra-lightweight
Suitable for Indoor & outdoor, daytime use
Tint note Shade may vary slightly from product images due to lighting and production variation

Block the Trigger.
Feel the Relief.

Unlike ordinary blue-light glasses, FL-41 lenses are a clinically recognised therapeutic tint — engineered to selectively filter the wavelengths that matter most for migraine and light-sensitivity sufferers.

Dispatch within 5 working days from order date.
Crystal | FL-41 Migraine Relief Glasses | Eyewearlabs