Brian’s Bullshit-Free Zone

Brian’s Bullshit-Free Zone

PSA: Blue light glasses are snake oil bullshit

They don't help you sleep better, and they don't protect your eyes from harmful computer screens.

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Brian Dunning
Apr 09, 2026
∙ Paid

The Internet says that blue light glasses — eyeglasses intended to protect your eyes from screens, and to help you sleep better at night — are amazing and you need to get some right away. I asked Google “How do blue light glasses help?” and here is the AI-generated summary I received:

Blue light glasses contain special filters in their lenses designed to block or absorb blue-violet light emitted by digital screens and artificial lighting. They aim to reduce digital eye strain, minimize headaches, improve visual comfort, and support better sleep by limiting evening exposure to light that disrupts melatonin production.

O rly, I say. Because that’s pretty much the opposite of what the American Academy of Ophthalmology says, as well as every other ophthalmology association in the world. Let’s break down these two claims and brutally, savagely dissect each one:

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