Blue light blocking glasses: How much of the hype is science-based?

Posted 14 September 2020

Blue light from our electronics is said to be harmful, and “blue blocking” glasses are touted as a panacea to numerous health issues. Is there any evidence to substantiate these claims?

Scott Gavura on June 25, 2020

Like a lot of people, I’ve been spending a lot more time staring at a computer screen lately. I have been working from home since March, and what used to be face-to-face meetings are now Zoom/Teams/GoToMeeting video calls. With videoconferences and related work, I’m easily spending several more hours per week staring at a computer screen. Afternoon headaches became a common occurrence shortly after this started, which I attributed to screen time and poor ergonomics. School for both of my kids has been transformed to an online environment too, with even more hours per day (above the baseline) spent staring at electronic devices. Recently my daughter told me she

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There’s No Evidence ‘Blue-Light Blocking’ Glasses Help You Sleep, Says Neurologist

Posted 14 September 2020


Health products, like detox teas and mood-boosting waters, rely on a lack of neuroscientific knowledge to make their claims. Some of these claims are unsubstantiated, while others are completely made up.

My doctoral research investigates visual processing, but when I look at the big picture, I realize that what I’m really studying are fundamental aspects of brain anatomy, connectivity and communication.

One specific function of the visual system that I have studied during my degree is the blue-light detecting molecule, melanopsin. In humans, melanopsin is seemingly restricted to a group of neurons in the eye, which preferentially target a structure in the brain called the suprachiasmatic nucleus — the body’s clock.

Circadian rhythms

This is where the (true) idea that blue light affects our sleep-wake cycle or circadian rhythm originates from. And also why many corrective lens

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