Blue light glasses are often talked about because we use screens a lot these days. These glasses have special lenses that are supposed to block the blue light from screens. They are sold with the idea that they can protect your eyes from getting tired and can help prevent damage to the back of your eye from too much blue light.

But, a recent study found little proof that blue-blocking filters can prevent digital eye strain. Many eye problems caused by screens aren't because of blue light. Most of these problems are part of something called computer vision syndrome (CVS), which includes a wide range of eye strain and discomfort issues.

Your eyes are always moving and changing focus when you look at the screen, and the glare and contrast can be hard on your eyes. So, even though your eyes might be irritated after a long day of working on your computer, it's not directly because of the blue light.

Even though blue light glasses don't really prevent digital eye strain, it doesn't hurt to wear them. Blue light is known to mess with your sleep schedule. So, if you're looking at your phone late at night or can't sleep, blue light glasses might be a good idea.

Research has suggested that too much exposure to visible blue light can also cause eyestrain. However, no big improvement in vision performance or sleep quality has been found from using blue-blocking lenses. Since the amount of blue light from devices used at work, school, and home is less than that of natural sunlight, and eyestrain hasn't been found to be related to blue light, what can be done to prevent it?

Looking at a screen for a long time makes you blink less, which reduces the layer of tears covering your eyes, making them dry. You can prevent this by taking breaks often during screen time, using artificial tears to refresh your eyes when they feel dry, and getting an eye exam to check for an uncorrected glasses prescription or refractive error.