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Dermatologists Break Down Blue Light And Its Effect On The Skin. Since the coronavirus pandemic took over our lives, forcing us indoors and in front of our screens, the term "blue light" has become a skincare buzzword. Emitted by ever-present electronics such as laptops, televisions and smartphones, blue light has been touted as an insidious, impossible-to-escape threat to the wellbeing of our faces. Brands have taken note as well, churning out blue light-blocking creams, serums and glasses to protect against the invisible force.