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Do blue light glasses help with sleep and eye strain?

What you hear: “Wearing blue-light-blocking glasses stops screen eye strain and helps you sleep.”

What the studies found

A 2023 Cochrane review of 17 randomised trials found blue-light filtering lenses may make no difference to eye strain from screens over the short term. They probably have no effect on sharpness of vision. For sleep, six trials with 148 people split evenly: three found better sleep scores and three found no difference.

Take care: A few trials reported headaches, low mood and discomfort while wearing the glasses.

What you could do

For tired eyes, take regular screen breaks; for sleep, dimming screens and lights in the evening is a cheaper first step.

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Not medical advice. General information from published studies, not a diagnosis or a treatment plan. Talk with your doctor before starting a supplement or changing a medicine, especially if you are pregnant, take other medicines or have a health condition.

How we judged it

Not proven: Not enough good human evidence yet, either way. We judge the claim as it is usually said online, not the habit itself. Trials assign people at random, so they can show cause; observed studies follow people and show a link, not proof. Last checked: October 2026.

The studies, in their own words

1. Singh et al. Cochrane Database Syst Rev 2023

   This systematic review found that blue-light filtering spectacle lenses may not attenuate symptoms of eye strain with computer use, over a short-term follow-up period, compared to non-blue-light filtering lenses.

2. Singh et al. Cochrane Database Syst Rev 2023

   Reported adverse events related to blue-light filtering lenses were infrequent, but included increased depressive symptoms, headache, discomfort wearing the glasses, and lower mood.

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