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Blue light emitted from digital devices (ie. televisions, computers, iPads, smart phones etc.) could contribute to poor sleep quality by suppressing melatonin.

People who wore blue wavelength-blocking glasses while still using their digital devices had a 58% increase in their night time melatonin levels.

The participants also reported sleeping better, falling asleep faster, and even increased their sleep duration by 24 minutes a night.

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    I recently changed my glasses to blue wavelength-blocking glasses. I had never made the correlation, but I have slept so much better ever since changing my glasses! I now have an understanding why! Thank you…

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      I read a study where some chinese athletes who used whole body near infrared light therapy before bed also reported much better sleep along with an almost 50 % rise in night time melatonin. In the study they were wearing dark glasses for the ½ hr of near infrared light exposure so there reduced exposure to blue light could have accounted for some if not all of the effect .