Of course, if the sun gets in your eyes, it’s imperative that you wear some sunglasses to protect the celestial bodies (not to mention that squinting can lead to wrinkles underline). Wearing sunglasses every second you’re outside can block some natural light and mess with your internal clock, Twiman says.
And if you are going to wear blue light glasses, try to keep them on for the times you are in front of a screen, as the natural blue light outside is nothing to worry about. “The blue light itself is not the problem,” says Twiman. “In Mother Nature, blue and red light are always in balance, and that’s the problem—it’s how little red light you’re getting from your devices,” he notes.