Photo: Shutterstock Blue light before bedtime can make it harder to sleep, and the screens on phones, computers, and televisions emit plenty of blue light. This is all true. But if you’re focused on blue light as a major problem affecting your sleep or your eye health, it’s time to step back and get a little perspective. As Philip Yuhas, a professor of optometry, writes at The Conversation , blue light isn’t a uniquely technological evil. It’s part of sunlight, and your eyes are exposed to plenty of it all the time. You’re fine. There are studies in mice that have found blue light can damage the eyes, but mice are nocturnal creatures whose eyes are different from ours. The pigments and the lenses of our eyes actually block blue light fairly well — so in a sense, we already have built-in blue blocking protection. Adding more protection isn’t […]