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What is Blue Light? Blue light is a harmful portion of light emitted by digital screens. According to the Paris Vision Institute, blue-violet light within the 415-455nm wavelength is potentially more harmful at the retinal level, as it can cause oxidative stress. Being continuously connected to digital technologies could contribute to headaches, sore or tired eyes, and stiff necks - all symptoms of digital eye strain. Spending the majority of our waking hours in front of device screens puts our eyes through a lot of wear and tear. At the same time, HEV light from our computers, phones and tablets could also put them at risk of aging faster. Protect Your Eyes with Blue Light Blocking Glasses. Blue light blocker glasses from PengSer are designed to filter out a portion of harmful blue-violet light. The premium features of organic lenses, makes screen time more comfortable and helps significantly reduce symptoms of digital eye strain.