According to a recent Cochrane review, eyeglasses promoted to block blue light likely have no impact on eye strain from computer usage or on sleep quality. According to a review of 17 randomized controlled trials, glasses marketed to filter out blue light likely don't alleviate eye strain from comp
A review of 17 randomized controlled trials found that blue-light filtering spectacles may not reduce eye strain from computer use or improve sleep quality. There’s also no evidence that they protect the retina, but larger and longer-term studies are needed to ascertain their effects fully.
Since the early 2000s, blue-light-blocking glasses have grown in popularity, frequently suggested or prescribed by optometrists., was led by researchers at the University of Melbourne in collaboration with colleagues at City, University of London, and Monash University. She said: “We found there may be no short-term advantages with using blue-light filtering spectacle lenses to reduce visual fatigue associated with computer use, compared to non-blue-light filtering lenses. It is also currently unclear whether these lenses affect vision quality or sleep-related outcomes, and no conclusions could be drawn about any potential effects on retinal health in the longer term. People should be aware of these findings when deciding whether to purchase these spectacles.
Prof. Downie said: “Over the past few years, there has been substantial debate about whether blue-light filtering spectacle lenses have merit in ophthalmic practice. Research has shown that these lenses are frequently prescribed to patients in many parts of the world, and a range of marketing claims exist about their potential benefits, including that they may reduce eye strain associated with digital device use, improve sleep quality and protect the retina from light-induced damage.
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