Shortsighted men eyewear frame
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Blue Light also known as high-energy visible blue light (HEV) has high frequency and short wavelengths similar to UV light. It’s found in sunlight and necessary for keeping us energized and awake, also regulating our circadian rhythm.
The issue arises though when blue light comes from artificial sources in large unwanted quantities.
"Blue light is something we're getting exponentially more exposed to because of our transition to a digital lifestyle," says David Friess, O.D., a Philadelphia-based research consultant. "Digital reading is not something we were designed to do.“
The American Optometric Association mentions a July 2015 study in the journal Free Radical Biology and Medicine, found that the more chronic the exposure to blue-light-producing LED lights, the more free radicals in the eye. This may contribute to aging of the eye and age-related vision problems in the long term.