AAO position
The Academy states there is no scientific evidence that light from screens damages the eyes and does not recommend blue light-blocking glasses or special eyewear for computer use.
AAO, 2021Eyeglasses and Optical · Blue Light Filtering
Blue Light Filtering Lenses What is sold, and what the evidence says.
Blue-light filtering lenses are one of the most requested add-ons in optical, and one of the most debated. A credible practice offers them with clear, honest framing and solves screen discomfort with the steps that are proven to help.
17Randomized trials in the 2023 Cochrane review
5 wkLongest follow-up in those trials
20-20-20AAO break rule for screen work
2021AAO statement on blue light glasses
The evidence
What major reviews have concluded
Two sources set the tone for patient conversations: the American Academy of Ophthalmology’s public guidance and a 2023 Cochrane systematic review.
Cochrane review
Seventeen randomized trials found blue-light filtering lenses may offer no short-term benefit for computer-related visual fatigue versus standard lenses. Effects on sleep were unclear.
Singh et al., 2023Retinal health
The review found no evidence on long-term retinal protection, because follow-up in the trials was too short to judge.
Cochrane, 2023What does help
Eye strain from screens is linked to how screens are used: reduced blinking and long stretches without breaks. Breaks, distance, lighting and lubricating drops are the AAO’s suggested fixes.
AAOHow the products differ
Products fall into two technical groups, and each brand describes its own filtering metric.
- Coating-based: reflects part of the blue-violet range
- Material-based: absorbs within the lens
- Photochromics that add blue filtering outdoors
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Coatings
Anti-reflective stacks tuned to reflect some blue-violet light, such as ZEISS DuraVision Plus BlueProtect and HOYA Recharge.
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Lens materials
Absorbing materials such as ZEISS BlueGuard and Shamir Blue Zero filter within the lens material itself rather than relying on the coating alone.
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Photochromics
Some light-adaptive lenses advertise extra blue-violet filtering, with ZEISS citing up to 50% indoors and 94% outdoors on its own 400–455 nm metric.
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Reading claims
Percentages depend on the wavelength band and the metric each brand chooses, so figures from different companies are not directly comparable.
In the exam lane and optical
An honest way to offer them
Patients will keep asking. The aim is an informed choice, plus real help for the symptoms that brought them in.
Ask about symptoms
Screen fatigue often overlaps with dry eye and uncorrected or under-corrected focusing needs. Address those first.
Share the evidence plainly
Explain that major reviews have not shown a clear benefit for eye strain or eye health, and let the patient decide on cosmetic or comfort preferences.
Recommend what works
An accurate screen-distance prescription or office lens, the 20-20-20 habit and lubricating drops for dry eye symptoms.
Evidence and product notes
Cochrane review at a glance (2023)
| Studies | 17 randomized controlled trials |
|---|---|
| Participants per study | 5 to 156 |
| Follow-up | Less than one day to five weeks |
| Visual fatigue | May be no short-term benefit versus non-filtering lenses |
| Sleep | Unclear |
| Retinal health | No conclusions possible |
| Authors’ view | Findings do not support prescribing these lenses to the general population |
AAO screen-comfort tips to share
- Sit about 25 inches, an arm’s length, from the screen and gaze slightly downward.
- Every 20 minutes, look at something at least 20 feet away for at least 20 seconds.
- Use artificial tears when the eyes feel dry, and adjust room lighting and screen contrast.
- Contact lens wearers can give their eyes a break by switching to glasses.
Related products
For patients whose screen discomfort turns out to be dry eye, see the artificial tears and lubricants guide for preservative-free options and how to route them through RescueLink.
Common questions about blue light lenses
Should we stop selling blue light lenses?
That is a practice decision. A practice can keep them available as an option while presenting the evidence honestly and leading with the treatments shown to help.
Do blue light lenses help sleep?
The 2023 Cochrane review found the effect on sleep quality unclear. The AAO suggests avoiding screens two to three hours before bed and using night mode.
Do screens damage the retina?
The AAO states that light from computer screens has never been shown to cause eye disease.
Is there harm in wearing them?
The Cochrane authors reported no consistent adverse effects; the ones reported were mild and similar to standard lenses.
What helps kids on screens all day?
The AAO gives the same advice as for adults: regular breaks are the best relief from eye strain.
References
- American Academy of Ophthalmology. Are blue light-blocking glasses worth it? March 2021. AAO
- Cochrane. Blue-light filtering spectacles probably make no difference to eye strain, eye health or sleep. July 2023. Cochrane
- ZEISS Vision Care US. BlueGuard and DuraVision Plus BlueProtect. ZEISS
- ZEISS. PhotoFusion X blue light figures. ZEISS
- HOYA Vision Care US. Product comparison guide (Recharge). HOYA
- Shamir. Blue Zero material. Shamir
Lead with evidence, offer with care
Solve the screen symptoms first, then let patients choose filtering lenses with the facts in hand.
BlueGuard, DuraVision, Recharge and Blue Zero are trademarks of their respective owners. Product filtering figures are the manufacturers’ own. This page summarizes published guidance and is not a clinical recommendation; decisions rest with the eye care professional.