Blue light is probably a factor in CVS, but other things are definitely factors: Low-resolution text that’s hard to read makes your eyes work harder to focus. Being engrossed in your screen causes your eyes to focus on a single point and at a single distance without breaks. And when you’re staring at a screen, you likely don’t blink enough, which dries out your eyes.īut if you don’t already wear glasses, you can correct all of that with a change in behavior, such as following the 20-20-20 rule (PDF), looking at a point 20 feet away, for 20 seconds, every 20 minutes. And spending too much time in front of an electronic screen really does cause them. Namely, the symptoms that make up computer vision syndrome- eyes that are dry, tired, “sandy,” or “gritty,” difficulty in focusing, and even headaches (PDF)-are a real thing. The strong research out there does agree on some things. The National Eye Institute representatives, after checking with their staff and going through their own research, as well as consulting their partners at the National Eye Health Education Program, told us they had no research available on the topic, either. Despite reading plenty of marketing materials alleging that blue light has been linked to AMD multiple times, we couldn’t track down any studies to support this claim. We even reached out to the National Eye Institute at the National Institutes of Health, asking about research into the relationship between blue light and vision symptoms or diseases such as age-related macular degeneration (AMD). Our science editor, Leigh Krietsch Boerner, wasn’t able to find that evidence lurking in the deep belly of academic journals. The best research related to the topic doesn’t cover the types of claims that manufacturers of computer glasses make, and most of the research that does address the marketing claims often lacks the scale or independence that would make us feel confident about the conclusions.īecause computer glasses skirt the “medical device” line, we didn’t want to recommend anything lacking a preponderance of evidence to support its efficacy. We started doing research on computer glasses to write a full Wirecutter guide in late 2016, but we concluded that it would be impossible for us to make a good pick due to the lack of credible evidence supporting their effectiveness. Unfortunately, there’s currently scant evidence to support the claim that computer glasses can reduce eyestrain or improve ocular health-especially for people who don’t already wear glasses. Q: What are computer glasses, or blue-light glasses, supposed to do? Do they work?Ī: You'll find no shortage of anecdotal reviews raving about how great a person’s eyes feel after wearing a pair of computer glasses, and many people report improved comfort with their use.
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