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Blue Light Filtering: What It Does (and Does Not) Do
Answer
What the coating actually does
Blue-light filters selectively reflect a band of high-energy visible light emitted by screens. Most wearers report reduced glare and more comfortable evening screen sessions.
What it does not do
There is no strong evidence that blue-light coating prevents digital eye strain on its own — the 20-20-20 rule and a proper prescription matter more. Think of the coating as comfort insurance, not medicine.
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测***
Finally an honest article about blue light filtering. Most sites oversell it.