I measured my stress levels while working with blue light glasses - and was surprised by the results

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ZDNET's key takeaways

• I used cortisol tests to see if blue light glasses reduced stress.
• I compared the glasses with meditation and avoiding screens.
• The glasses helped, but so did deep breathing and avoiding screens.

As someone whose day is defined by screens, I've started to wonder about the toll they take on my sleep. I've always considered myself a good sleeper, but I'm curious if there's a level of rest I'm missing out on.

Science suggests screen use, especially in the evening, may trigger spikes in cortisol, the stress hormone, as a result of the blue light emitted by screens and the constant influx of overstimulating information. There are also links between blue light from screens ...