没有科学证据表明蓝光对我们的眼睛有害
文章来源:未知 文章作者:enread 发布时间:2018-07-01 07:02 字体: [ ]  进入论坛
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Blue light is a type of electromagnetic radiation with a very short wavelength1 that produces a high amount of energy. While it's true that light can damage your eyes under certain circumstances, there's no scientific evidence suggesting that blue light is harmful to our eyes. But many people still think it is, which is why blue light-blocking glasses are so popular.
 
蓝光是一种波长非常短、能量巨大的电磁辐射。虽然在某些情况下光线确实会损伤我们的眼睛,但是目前并没有科学证据表明蓝光对我们的眼睛有害。不过许多人仍然认为蓝光确实有害,这就是防蓝光眼镜如此受欢迎的原因。
 
"Everyone is very concerned that (blue light) may be causing damage to the eye, and it's a valid2 concern, but there's no evidence it may be causing any irreversible damage," Dr. Rahul Khurana, clinical spokesman for the American Academy of Ophthalmologists, told Business Insider.
 
Blue light exposure is nothing new. In fact, the sun is the largest source of blue light. Moreover, blue light is also present in fluorescent3 and LED light.
 
But if blue light isn't harmful, then why are we constantly rubbing our peepers when we're looking at our screens? The answer is eyestrain: More than 60 percent of people experience problems associated with digital eyestrain. And blue light, it seems, isn't the cause. Instead, our eyes are so strained because most of us blink less when we stare at our digital devices.
 
So if eyestrain is the real issue, blue light-blocking glasses are probably useless. However, wearing them could potentially help you get a good night's sleep. That's because blue light, research has shown, affects your body's circadian rhythm, your natural wake and sleep cycle. According to Harvard researchers, any kind of light -- including blue light -- can tamp4 down your body's ability to secrete5 melatonin, a hormone6 that helps you sleep.


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1 wavelength 8gHwn     
n.波长
参考例句:
  1. The authorities were unable to jam this wavelength.当局无法干扰这一波长。
  2. Radio One has broadcast on this wavelength for years.广播1台已经用这个波长广播多年了。
2 valid eiCwm     
adj.有确实根据的;有效的;正当的,合法的
参考例句:
  1. His claim to own the house is valid.他主张对此屋的所有权有效。
  2. Do you have valid reasons for your absence?你的缺席有正当理由吗?
3 fluorescent Zz2y3     
adj.荧光的,发出荧光的
参考例句:
  1. They observed the deflections of the particles by allowing them to fall on a fluorescent screen.他们让粒子落在荧光屏上以观察他们的偏移。
  2. This fluorescent lighting certainly gives the food a peculiar color.这萤光灯当然增添了食物特别的色彩。
4 tamp kqsw3     
v.捣实,砸实
参考例句:
  1. Then I tamp down the soil with the back of a rake.然后我用耙子的背将土壤拍实。
  2. Philpott tamped a wad of tobacco into his pipe.菲尔波特往烟斗里塞了一卷碎烟叶。
5 secrete hDezG     
vt.分泌;隐匿,使隐秘
参考例句:
  1. The pores of your body secrete sweat.身上的毛孔分泌汗液。
  2. Squirrels secrete a supply of nuts for winter.松鼠为准备过冬而藏坚果。
6 hormone uyky3     
n.荷尔蒙,激素,内分泌
参考例句:
  1. Hormone implants are used as growth boosters.激素植入物被用作生长辅助剂。
  2. This hormone interacts closely with other hormones in the body.这种荷尔蒙与体內其他荷尔蒙紧密地相互作用。
TAG标签: light blue eyes
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