Jennifer Lopez is wearing them, Kylie Jenner and Rashida Jones are promoting them, and Drew Barrymore is selling them. Blue-light glasses are taking shape to be supportive of our prolonged screen mediated moment. But do we need them?
Blue-light glass is equipped with lenses, which filter out some of the light waves that are emitted by the sun and to some extent by digital devices such as phones, laptops and tablets. Blue light is not inherently bad; It enhances meditation and awakening during the day. But it suppresses the natural production of melatonin at night.
By limiting exposure to blue light by at least 20 percent, the companies say, a customer can sleep better, experience less eye strain and prevent potential damage.
However, scientists are not sure that the spectacle is a worthy investment.
“Whatever aspect you look at, it is very difficult to justify spending extra money,” Dr. Said John Lawrenceon, a professor of clinical visual science at the University of City, London. (Prices vary, but start at about $ 20.) After reviewing several studies that tested the effectiveness of blue-light-blocking lenses, he and his colleagues concluded that glasses are not necessary.
The digital eye strain is real, but it is impossible to say with certainty that the culprit is a blue light. “No one has established an independent causal association between blue light coming from computers and visual symptoms,” Dr. Lawrenceson said. He It is advisable to go to an eye doctor instead of hurrying to buy nonscript glass.
Despite this, the blue light category is booming. A quick Google search pulls up several brands that sell almost exclusively “computer specs” (such as Felix Gray, which raised more than $ 1.7 million in funding in 2020, bringing its total funding to $ 7.8 million as of September ), As well as prescription-eyewear companies such as Zenni (which according to the company sold two million pairs of its Blokz lenses in 2020) and Gins (which were up-and-coming online orders last year). If you recently shopped at Warby Parker, you were probably asked if you wanted to add a blue-light filter to your lenses.
Neil Blumentl, a chief executive of Warby Parker, wrote in the email, “Since the last year many customers started working from home, we have seen a significant increase in demand for these lenses.” “Last April, we saw a large increase, especially for non-transcription blue-light-filtering lenses and we have seen this trend continue throughout the epidemic.”
Retina Specialist Dr. of Lahey Hospital & Medical Center, Massachusetts. David Ramsey stated that the amount of blue light that comes out of our devices is a serious risk. Our eyes take in more blue light from inside to outside even when it is out of the cloud. To get a sense of scale, Drs. Ramsey suggested taking one of your devices on a bright day. “How many of us have stayed on the beach with our laptops or our cellphones and how hard is it to read the screen?” They said.
The idea that blue light glasses can protect the retina from damage is so unfounded that in the United Kingdom, Boots opticians were fined £ 40,000, or about $ 56,000, after making “misleading and unfounded” claims on the subject.
A study of 5,000 eyes analyzed what happens when a blue-light filter is added to a synthetic lens that is implanted into the eye after cataract surgery. The authors found no conclusive evidence that the filters were beneficial in any way. The American Macular Degeneration Foundation clearly stated that “there is not much evidence to support the wearing of blue-light-blocking glasses for daily use.”
If eye strain is your concern, consider moving away from the screen. “Using our computer for a long time can cause eye strain. Taking a break is important, ”Dr. Ramsey said. “Less has nothing to do with blue light, less so.”
For sleep, exposure to blue light suppresses the production of melatonin, causing people to sleep. This is why when we wake up in sunlight we wake up more and feel more tired when we set it. Exposure to blue light at night can help maintain dichotomy. But instead of putting blue-light glasses on before bedtime, try to keep your phone an hour or two ahead. Ultimately, studies have shown that screen time can negatively affect sleep for several reasons.
Sleep experts also recommend exercising, not eating dinner too late, earlier bed routines, and cutting back on news and social media in the evening – good advice for anyone, especially these days. “Sleep hygiene is very important,” Dr. Ramsey said. “Practices around us for sleeping are just as important, if not more important than exposure to blue light.”