
Seren · FL-41
FL-41 migraine glasses & photophobia glasses
The office lights. A bright screen. A room that feels harder to sit in than it should. With migraine, light sensitivity can get in the way of simple things.
Seren is our specialist FL-41-tinted eyewear for people exploring migraine glasses and photophobia glasses. Photophobia means light sensitivity: everyday light can feel too bright or uncomfortable.
The rose-tinted lenses filter the light that reaches your eyes. FL-41 has been studied for migraine-related light sensitivity and may ease light discomfort for some people.
Read our guide to FL-41 and migraine · Read the five-point guide

Why a tint can matter
The eye does more than help us see. Light also sends signals to parts of the brain that affect how we feel. In migraine, light can feel far too strong. This is called photophobia. It means light sensitivity.
FL-41 changes the light that passes through the lens. Researchers have studied this tint for light discomfort. The aim is to make bright settings easier to manage for some people.
One light-sensing system in the eye uses a pigment called melanopsin. Its response is strongest near 480 nm. That helps explain why researchers study light colour. It does not mean every FL-41 lens has one fixed blocking band.

The pair at a glance
| Lens | FL-41 tint |
|---|---|
| Frame | Black geometric style |
| Who it is for | Adults · Unisex |
| Included | One pair of glasses |
What has FL-41 research found?
Migraine research · 1991
20 children
A promising early finding
A four-month study compared rose and blue tints. In the rose-tint group, average headache frequency fell from 6.2 to 1.6 a month. The blue-tint group did not sustain its early improvement.
A small study in children. Read the study.
Light-sensitivity research · 2024
19 of 25 adults
Less light discomfort reported
In a study of chronic eye pain and photophobia, 19 people reported less light-evoked unpleasantness with FL-41. Two reported no change and four reported more.
A small case series using another brand’s FL-41 lens. This was not a migraine-prevention trial. Read the study.
A separate light-threshold study found that both grey and FL-41 lenses helped, with no clear difference between them. Read that study.

Your questions, answered
Is this for migraine or light sensitivity?
Seren is our FL-41-tinted option for people exploring glasses for light sensitivity, including sensitivity linked to migraine.
Are these the same as Dante?
Seren uses the same frame shape as Dante, with an FL-41 tint. Dante is our amber blue light option. A shared frame shape does not make the two lenses the same filter.
Will colours look different?
Yes. The visible tint changes the view. Consider this for colour-critical tasks. These glasses have not been verified for driving or as a substitute for certified sunglasses.
When should I wear them?
Consider the settings in which light feels uncomfortable, such as overhead lighting or screens. Ask your optometrist about suitable use if you have migraine, another eye condition or a prescription. Stop using the glasses if they make symptoms worse.
Can I order Seren with prescription lenses?
A prescription version is not currently listed for Seren. If you need prescription lenses or a pair to wear over your existing glasses, contact us before ordering to check suitability.
What are the measurements?
We have not received confirmed dimensions for this exact product. Please contact us if you need fit details before ordering. Photographs cannot give an exact fit measurement.
What about delivery and returns?
Estimated delivery times are shown at checkout before you pay. You have 30 days after delivery to request a return. Sale items are included. Items must be unworn or unused, with tags and original packaging. Proof of purchase and other policy terms apply. This is not a wear trial.

Choose with a clear view.
See the original product photo and gallery above. Check the tint, frame and order details. If you are looking into FL-41 for light sensitivity, Seren is the dedicated option in our range.
Back to the productFor new, severe or changing headaches or light sensitivity, get medical advice. NHS migraine information.