本帖最后由 撒撒 于 2024-3-23 23:12 编辑
Science Focus ：https://www.sciencefocus.com/new ... ng-lenses-dont-work
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不，阻挡蓝光的眼镜并不是真的有效--现在科学家已经证明了这一点
想买一副蓝光眼镜，或者在眼镜上加装滤光片吗？科学家说，这可能不值得费心。
诺亚·利奇 发布时间：2023 年 8 月 18 日 在 上午 7 点 01 分
我们中的许多人通过戴上蓝光过滤眼镜来减轻我们对屏幕时间过长和睡前滚动的内疚感。但它们会有所作为吗？科学家在对现有证据的新审查中说，可能不是。
蓝光是可见光谱的重要组成部分，但也由手机和电脑等人造光源发出。
自 2000 年代初以来，配镜师推荐的蓝光滤光片一直在上升。营销声明表明，它们可以减少因蓝光过多而引起的眼睛疲劳和睡眠中断。
但是，来自澳大利亚墨尔本大学以及伦敦大学和澳大利亚莫纳什大学的科学家已经审查了17项随机对照试验，以找出蓝光滤光片是否真的有任何区别。
答案是什么？他们发现，镜片实际上对屏幕引起的眼睛疲劳或睡眠质量没有任何影响——至少在短期内是这样。
研究小组还发现，没有证据表明晶状体可以防止视网膜（眼睛的一部分，它吸收光线并将其转化为大脑的信号）。这在一定程度上可以解释为原始研究没有对此进行评估。
“这篇评论相当可怕，”牛津大学的Andrew Przybylski教授说，他没有参与这篇评论。“它为公众提供了一个机会，让他们停下来问问自己，他们是否真的应该改变自己的行为或购买东西来解决他们担心的数字时代的问题。
据研究人员称，我们的眼睛从手机和电脑屏幕等人造光源接收到的蓝光量仅为自然光的千分之一左右。更重要的是，镜片只能阻挡10-25%的蓝光。
“过滤掉更高水平的蓝光需要镜片具有明显的琥珀色，这将对颜色感知产生重大影响，”第一作者Sumeer Singh博士说。
墨尔本大学的资深作者Laura Downie教授补充说：“人们在决定是否购买这些眼镜时应该意识到这些发现。
然而，由于该综述只研究了时间尺度在一天到五周之间的短期研究，因此需要更多的研究来确定镜片的长期有效性。
辛格呼吁“在更多样化的人群中进行高质量、大型的临床研究，并进行更长的随访时间”，以明确回答蓝光滤光片是否有任何好处——以及这些是否适用于每个人。
但是，如果您已经佩戴了它们，请不要担心。这些研究没有发现佩戴这些镜片除了通常与戴眼镜相关的副作用之外的任何负面副作用，例如不适和头痛。
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No, blue light blocking glasses don’t really work – and now scientists have proven it
Thinking about getting a pair of blue light glasses, or having a filter added to your specs? It’s probably not worth the bother, say scientists.
Close-up man's face wearing blue light filtering glasses which reflect his screen - but these lenses have not proved to be effective, say scientists
Noa Leach Published: August 18, 2023 at 7:01 am
Many of us assuage our guilt over maxed-out screen times and scrolling before bed by wearing blue light-filtering glasses. But do they make a difference? Probably not, say scientists in a new review of available evidence.
Blue light is a prominent part of the visible light spectrum but is also emitted by artificial sources like phones and computers.
Optician-recommended blue light filters have been rising since the early 2000s. Marketing claims suggest that they reduce the eye strain and sleep disruption caused by excessive blue light.
But scientists from the University of Melbourne, Australia as well as the University of London and Monash University, Australia, have reviewed 17 randomised control trials to find out whether blue light filters really make any difference.
The answer? They found that it’s likely that the lenses in fact make no difference to eye strain or sleep quality caused by screens whatsoever – at least in the short term.
The team also found no evidence that the lenses protect against damage to the retina (the part of your eye which takes light and turns it into signals for your brain). This is partly explained by the fact the original studies did not evaluate this.
“This review is fairly damning,” said Prof Andrew Przybylski from the University of Oxford – who was not involved in the review. “It provides the public an opportunity to pause and ask themselves if they really should be changing their behaviour or buying things to address what they fear are problems of the digital age.”
According to the researchers, the amount of blue light our eyes receive from artificial sources like phones and computer screens is only around one-thousandth of what comes from natural daylight. What’s more, the lenses only block out 10-25 per cent of blue light.
“Filtering out higher levels of blue light would require the lenses to have an obvious amber tint, which would have a substantial effect on colour perception,” said first author Dr Sumeer Singh.
Senior author Prof Laura Downie of the University of Melbourne added: “People should be aware of these findings when deciding whether to purchase these spectacles.”
However, since the review only looked at short-term studies with timescales between one day to five weeks, more research is needed to determine the lenses’ effectiveness in the longer term.
Singh called for “high-quality, large clinical research studies with longer follow-up in more diverse populations” to get a clear answer on whether there are any benefits of blue light filters – and whether these apply to everyone.
But if you already wear them, don’t worry. The studies didn’t find any negative side effects of wearing these lenses beyond those usually associated with wearing glasses, such as discomfort and headaches. | 
发表于 2024-3-23 22:43
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楼主
我开了手机和电脑屏幕的护眼模式，屏幕变得尿黄尿黄的，看了一会就觉得眼睛酸涩难受，忍着用了几天感觉眼睛要瞎了、于是关掉了。能把这个事实加到你的理论里吗？
发表于 2024-3-24 10:02
