The secret to a great night's sleep

Can “Blue-blocker” glasses help you sleep?


According to a new study by the Journal of Adolescent Health, the blue glow from televisions and other screens effect the natural mechanisms that help us to fall asleep at night. It can be difficult to wind down after a day of glaring into a computer screen but blocking the blue wavelengths which are absorbed from screens can help restore natural night-time sleepiness.


A pair of spectacles known as "blue-blocker" glasses filter out the wavelengths of light in the blue portion of the visible spectrum, this allows for the hormone melatonin, which promotes sleepiness, to naturally rise in the evening which the blue rays can often stop. The brain should begin to slow down and shift into sleep mode during the evening and exposure to the blue lights keeps the brain alert and "activated".


Those who wear prescription glasses are often given the option to have "blue-blocker" built in as part of their prescription, do you have tailored glasses for computer use? We'd like to know, get in touch on Facebook or Twitter.

Source: Journal of Adolescent Health, online October 3, 2014.

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