Reference
Sources
Everything we cite, collected in one place. If a claim on this site is not traceable to something on this page, it should not be there — tell us and we will fix it.
Last reviewed August 2026. We update a page when the underlying evidence changes, not on a schedule.
What each finding rests on
Blue-light filtering lenses probably do not reduce digital eye strain.
Strong evidence
Screen light is not known to damage the eye, and these lenses are not eye protection.
Strong evidence
Evening light genuinely affects the body clock, but whether consumer blue-blocking glasses improve sleep is unresolved.
Mechanism established; product benefit uncertain
- Blue-light filtering spectacle lenses for visual performance, sleep, and macular health in adults
- Amber lenses to block blue light and improve sleep: a randomized trial
- Blocking nocturnal blue light for insomnia: a randomized controlled trial
- Wearing blue light-blocking glasses in the evening advances circadian rhythms in patients with delayed sleep phase disorder
Digital eye strain is real. Its likely causes are behavioural and optical, not blue light.
Professional consensus
Full reference list
- Blue-light filtering spectacle lenses for visual performance, sleep, and macular health in adultsSingh S, Downie LE, Anderson AJ, et al. — Cochrane Database of Systematic Reviews, 2023, Issue 8Systematic review of 17 randomised controlled trials (619 participants, 6 countries)
- Are Blue Light-Blocking Glasses Worth It?American Academy of Ophthalmology — aao.org patient educationProfessional body position statement
- Computers, Digital Devices and Eye StrainAmerican Academy of Ophthalmology — aao.org patient educationProfessional body guidance
- Review finds there may be no benefit using blue-light filtering spectaclesThe College of Optometrists (UK) — college-optometrists.org, September 2023Professional body commentary on the Cochrane review
- Amber lenses to block blue light and improve sleep: a randomized trialBurkhart K, Phelps JR — Chronobiology International, 2009;26(8):1602-12Randomised trial, 20 participants
- Blocking nocturnal blue light for insomnia: a randomized controlled trialShechter A, Kim EW, St-Onge MP, Westwood AJ — Journal of Psychiatric Research, 2018;96:196-202Randomised crossover trial, 14 participants with insomnia symptoms
- Wearing blue light-blocking glasses in the evening advances circadian rhythms in patients with delayed sleep phase disorderEsaki Y, Kitajima T, Ito Y, et al. — Chronobiology International, 2016;33(8):1037-44Open-label trial (no blinding, no placebo arm)
- How Blue Light Affects SleepSleep Foundation — sleepfoundation.orgConsumer health reference, clinically reviewed
- Computer Vision SyndromeAmerican Optometric Association — aoa.orgProfessional body guidance
- FTC Guides Concerning the Use of Endorsements and Testimonials in AdvertisingU.S. Federal Trade Commission — ftc.gov, 2023 revisionRegulatory guidance
On reading these yourself
Most of these are freely readable, and the Cochrane review in particular has a plain-language summary near the top that takes about three minutes. We would rather you checked our work than took it on trust — that is the point of publishing the list.