On product pages, blue light glasses only have upsides. We sell them, and we still think you should know their limits before you buy. Here are the real downsides, what eye doctors say, and the cases where a pair still makes sense.
What eye doctors say
Specialists are cautious, and fairly consistent:
- The American Academy of Ophthalmology does not recommend blue light glasses for screen work. In its view, blue light from screens does not damage the eyes, and eye strain mostly comes from blinking less in front of a screen.
- A Cochrane review published in 2023, pooling 17 trials, concludes that these lenses probably make little or no difference to short-term eye strain, and that their effect on sleep remains uncertain.
- In France, ANSES (the national health safety agency), in its 2019 opinion on LEDs, judged the effectiveness of blue light protections (coated lenses, glasses, screen filters) to be highly variable.
What eye doctors recommend instead fits in a few habits: the 20-20-20 rule (every 20 minutes, look 20 feet away for 20 seconds), a screen at arm's length and slightly below eye level, fewer reflections, and an eye test if the discomfort lasts. We go through them in 8 habits against eye strain.
7 downsides to know about
1. A limited effect on eye strain
This is the main point. If your eyes sting at the end of the day, a pair won't fix it on its own: breaks, blinking and screen settings matter more. The studies are covered in blue light glasses: what are they really for?
2. Altered colours with tinted lenses
An amber or orange lens filters more blue, but it warms up everything you see. For photo editing, video editing or graphic design, that's a deal-breaker. Clear lenses barely change colours.
3. Not for driving at night
A tinted lens removes part of the light, which is exactly what you don't want at night. The European standard for filtering lenses advises against lenses that let through less than 75% of light for driving at dusk or at night. Everything is explained in driving at night with blue light glasses.
4. Bluish reflections on clear lenses
On a clear lens, the filter is often a surface coating that reflects a small part of the blue. The result: a slight blue or purple reflection visible from the outside, on video calls or in flash photos. It isn't a defect, but it's better to know.
5. A false sense of protection
This is the most serious risk: feeling protected and skipping breaks, or blaming the screen for headaches that actually come from an uncorrected vision problem. A non-prescription pair corrects nothing. Frequent headaches, blurry vision, squinting: you need an eye test, not glasses.
6. One more pair if you already wear prescription glasses
You don't wear two pairs on top of each other. If you have a prescription, the right option is a filter on your own lenses, at your optician, at your next renewal. What French health insurance covers (and what it doesn't) is explained in our article on reimbursement.
7. Percentages that are hard to check
"Blocks 99% of blue light": without a wavelength range, that number means nothing. A perfectly clear lens cannot filter a large share of visible blue light. Be wary of percentages that sound too good.
So who is it still worth it for?
- People who like the comfort of an anti-reflective lens in front of a screen, under a ceiling light or near a window. It's subjective, but real for many people.
- People who stay on a screen late in the evening. A tinted lens filters far more blue than night mode. Its effect on sleep is debated, but it's the most defensible use: see blue light glasses for sleep.
- People who want a non-prescription work pair, lightweight, that also serves as a reminder to take breaks.
And who can do without? People who already wear recent prescription glasses with a good anti-reflective coating, and people who spend little time in front of a screen.
Where we stand
We sell non-prescription blue light glasses, and we don't claim they have any medical power. Clear lenses for the day (MIDI, HAVANE, JADE), tinted lenses for the evening (DUNE, BRAISE). If your pair does nothing for you, you have 30 days to send it back.