The Eye Clinic4 min read
If you spend your day on screens, you've probably been offered blue-light glasses. Do they actually help? Here's a straight answer.
What blue light actually is
Blue light is simply part of the everyday light spectrum — and by far your biggest source of it is the sun, not your laptop. Screens emit only a tiny fraction by comparison.
The claim versus the evidence
Blue-light glasses are marketed to reduce eye strain and protect the retina. The current evidence doesn't show that filtering blue light from screens meaningfully reduces eye strain or prevents eye damage.
In other words, they're unlikely to do any harm — but they're probably not the fix they're sold as.
What really causes screen eye strain
Tired eyes at the end of a screen-heavy day are usually down to how we use screens, not the blue light itself: we blink far less, stare at a fixed distance for hours, and often work in poor lighting. That's also why screens can leave eyes feeling dry and gritty.
What genuinely helps
Simple habits do more than any lens: the 20-20-20 rule (every 20 minutes, look at something 20 feet away for 20 seconds), remembering to blink, good lighting, and regular breaks.
If your eyes still feel dry, gritty or tired despite all that, it's worth having them checked — a proper assessment finds what's actually going on.
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