> blue light blocking glasses may not actually help with eye strain or sleep quality, researchers findNew research shows: blue light blocking glasses may be an "IQ tax".
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blue light glasses gained popularity over the past few years with the idea that they protect our eyes against screen usage — but a new analysis shows they might not be as beneficial to our eye health as previously hoped.Blue-light glasses have grown in popularity over the past few years because they claim to protect the eyes from electronic screens, but a new analysis suggests that blue-light glasses may not be as good for eye health as we might expect.
researchers reviewed data from 17 randomized controlled trials and published the results friday in the cochrane database of systematic reviews journal.The researchers assessed data from 17 randomised controlled trials and published their findings in the journal Cochrane Database of Systematic Reviews on 8 December.
the findings glasses marketed to filter out blue light probably make no difference to eye strain or sleep quality.Studies have found that blue-light filtering glasses on the market** may have no effect on eye fatigue or sleep quality.
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," said laura downie, senior author of the review and associate professor at the university of melbourne, victoria, australia, in a news release.Laura Downey, lead author of the study and an associate professor at the University of Melbourne in Australia, said in a press release: "We found that there may be no short-term advantage to using blue-light-filtering lenses to reduce visual fatigue associated with computer use compared to regular 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," she added. "people should be aware of these findings when deciding whether to purchase these spectacles.""It's unclear whether these lenses affect vision quality or sleep, and it is not possible to draw conclusions about their potential long-term effects on retinal health," she added. People should be aware of these findings when deciding whether or not to buy blue-light blocking glasses. ”
the studies they reviewed ranged in size and length, with a span from as few as five to as many as 156 participants assessed over different periods, from less than one day to five weeks.The studies evaluated by the investigators varied in size and length of time, ranging from as few as 5 to as many as 156 people, and ranged from less than a day to five weeks.
the authors said more research with longer follow-ups in more diverse populations is needed to better assess any potential effects.Longer follow-up studies in more diverse populations are needed to better assess any potential impacts, the authors say.
more studies) should examine whether efficacy and safety outcomes vary between different groups of people and using different types of lenses," author dr. sumeer singh, a postdoctoral research fellow in the downie laboratory, advised for future research.Study author Dr. Sumel Singh, a postdoctoral fellow at Downey Labs, suggests future research: "[More studies] should look at whether there are differences in efficacy and safety outcomes between different populations and using different types of lenses. ”
instead of shelling out money for special shades, however, experts advise taking screen breaks.However, experts recommend that instead of spending money on special glasses, it is better to give your eyes a break.
Snow blankets northern China, closing roads and schools and suspending train service Many places in the north ushered in snowfall and cooled down All departments have made joint efforts to cope with bad weather.
a snow-covered street in zhengzhou. [photo by qi xin/for chinadaily.com.cn]
overnight snowfall across much of northern china prompted road closures and the suspension of classes and train service on monday.On December 11, overnight snowfall in much of northern China led to road closures, school closures, and train stops.
a red alert for a blizzard was in effect until mid-morning in zhengzhou, the capital of henan province, and schools were closed there and in two other cities in henan, state broadcaster cctv reported.Zhengzhou, the capital of Henan Province, did not lift the red alert for blizzard until 9:35 a.m., and schools in Zhengzhou and two other cities in Henan were closed, according to China** television.
the zhengzhou airport was also closed until 11 a.m.Zhengzhou Airport also resumed operation after 11 o'clock.
a total of 134 road sections in 12 provinces, including 95 on highways, were closed as of 7 am because of snowfall and icy conditions, cctv said.As of 7 a.m., 134 road sections (involving 95 highway sections) in 12 provinces have been closed due to snowfall and icy roads, according to ** TV.
several trains in two parts of shanxi province were suspended.A number of trains in two areas of Shanxi Province have been suspended.
it was the first significant snowfall this year in much of china.This snowfall is the first heavy snowfall in most parts of China this year.
a thin layer of snow blanketed rooftops and parked cars in downtown beijing.A thin layer of snow covers the rooftops and parked cars in downtown Beijing.
the roads were mostly clear and workers swept remaining snow from the sidewalks.Most of the roads have been cleared, and crews are busy clearing snow from the sidewalks.
the beijing public transport group said that 187 bus routes were suspended on monday morning.Beijing Public Transport Group said a total of 187 bus routes were suspended Monday morning.
some subway lines were adding additional trains during the morning rush hour, cctv said.CCTV reported that some subway lines added temporary trains during the morning rush hour.
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*：chinadaily.com.cn