![]() ![]() Blue light blocking technology can help reduce that strain by making the light appear more soothing and less bright.If you believe the hype, blue-light-blocking glasses will prevent headaches, decrease eyestrain, and help you sleep like a baby. Your eyes can become dry, irritated, or blurry and you can even get headaches when you look at screens for hours on end. While the radiation might not hurt your eyes, fixating on a powerful light source a few inches or a few feet from your eyes for long periods can cause eye strain (Opens in a new window). This doesn't mean you should simply ignore the effects of staring at a screen all day. In fact, the AAO doesn't recommend any special eyewear (Opens in a new window) for computer use. The whites are cool, but they aren't harmful. The American Academy of Opthalmology (Opens in a new window) notes that ultraviolet radiation can damage eyes but that computer monitors and other screens don't emit that kind of radiation. ![]() Essentially, blue light can't directly damage your eyesight. ![]() Here's where it gets tricky: claims from manufacturers of blue light blocking glasses that don't necessarily hold up to medical scrutiny. That means the light coming from your screen is quite blue you can notice this difference if you compare a web page with a white background to a warm light bulb.īlue light is often cited as the culprit for eye strain and even eye damage, so, naturally, the solution should be to warm that light up before it hits your eyes. Computer monitors typically set white at a very cool temperature to emulate natural sunlight, close to 6,500K. Confusingly, warmer light has a lower color temperature than cooler light, with the almost fiery glow of tungsten hitting around 2,800K and overcast sunlight hitting about 6,000K. What we perceive as white light shifts along a range of about 2,700K to 7,000K. This effect is called color temperature and is measured in kelvin (K). For instance, the light coming from an incandescent LED light bulb is warmer than the light coming from a computer monitor. ![]() Depending on the lighting conditions and what is radiating and reflecting light, white light can appear very yellow (warm) or blue (cool) in color. There is no singular white, but a whole range of visible light that counts as white. Without going too far into the weeds, you simply need to understand one fact about light: The color white isn't universal. That's not the full picture, though, and this is where light and color theory comes into play, along with concepts like color temperature, Planck's Constant, and the black body radiation curve. On the most basic level, blue light is exactly what it sounds like: light that's blue. Here's what you should know about blue light and some of your choices for reducing your exposure to it. But it's important to understand that you have lots of options for reducing eye strain when staring at screens beyond just getting new lenses. Maybe a pair of blue light blocking glasses even caught your attention. You've probably already heard of blue light and how it can hurt your eyes. The more time we spend at home staring at screens, the more vulnerable we are to eye strain. How to Set Up Two-Factor Authentication.How to Record the Screen on Your Windows PC or Mac.How to Convert YouTube Videos to MP3 Files.How to Save Money on Your Cell Phone Bill.How to Free Up Space on Your iPhone or iPad.How to Block Robotexts and Spam Messages. ![]()
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