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新一代兒童週報/護眼抗藍大作戰

2018-10-25 18:36聯合新聞網 新一代兒童週報

智慧型手機。圖/路透
智慧型手機。圖/路透
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智慧載具傷眼

We all use technology every day. Smartwatches, smartphones and tablet devices make computers convenient and fun. But have any adults told you not to spend so much time on these devices? One downside of staring at a screen so much is the danger to your eyes. It’s because of the color of light coming out of the screen.

我們每天都在使用科技產品。智慧手錶、智慧手機和平板載具,讓電腦變得輕便、好玩。但有沒有大人告訴過你,使用這些載具的時間不宜太長? 長時間直視載具的壞處是,它會傷害眼睛。問題就出在螢幕透出的光的顏色。

眼睛細胞慢性傷害

Scientists the world over are discovering the dangers of blue light coming from smartphones, tablets and other devices. Researchers at the University of Toledo in the US have found that staring at a screen can irreparably damage our eyes over time. It happens slowly, but damage builds up over time in the cells of the eye that are sensitive to light. However, not all blue light sources are the same.

智慧手機、平板及其他通訊載具發出藍光,全球科學家都發現了這種藍光的危險性。美國俄亥俄州托雷多大學的研究人員發現,眼睛直視藍光,長久下來會對眼睛造成無法挽回的傷害。這些傷害不是立刻造成,而是積累在對光敏感的眼球細胞上。然而, 藍光的光源也分很多種。

天然ㄟ尚好

Light from the sun contains all the colors that we can see: red, orange, yellow, green, blue, violet and shades in between. When all of these wavelengths of light combine, we only see “white light” or sunlight. Although the blue and violet wavelengths have more energy than the others, the sun’s blue light is balanced with the other wavelengths.

太陽光由紅、橙、黃、綠、藍、紫,以及其他中間色的光組成。所有這些顏色光的波長和在一起,我們看到的就是「白光」,亦即日光。各種顏色的光之中,雖然藍光和紫光的能量較強、對眼睛傷害較大,但太陽藍光因被其他顏色光的波長加以平衡,因此正常曬太陽並無大礙。

人造ㄟ有害

Man-made light sources also contain many wavelengths. LED lighting, fluorescent bulbs and flat-screen televisions all give off blue light. The problem is out of all the visible light from man-made devices, roughly one-third of it is considered “blue” or high-energy visible (HEV) light. That light is far more concentrated than the sun’s blue light which gets scattered in the atmosphere. The amount of HEV light given off by man-made devices is very small when compared with the amount given off by the sun. But while very few people would spend hours staring at the sun, many of us spend as much time staring at our devices. Just two hours can give you eyestrain.

人造光源跟太陽光一樣,也含許多不同波長。LED 燈、日光燈泡和平板電視都會發出藍光。人造光源器材最大的問題是,它們發出的可見光中,近約3 分之1 被視為藍光或高能可見光。跟分布在大氣層裡的太陽藍光相較,人造藍光的能量更加集中。人造器材或載具發出高能可見光的量,自然無法跟太陽相比。花數小時直視太陽的人少之又少,但花數小時直視載具的人卻不少。只需盯著螢幕兩小時,眼睛就受不了。

太陽藍光調節生理時鐘

Should we hide from all blue light? Definitely not! The sun’s blue light sets your circadian rhythm—we need that to get a good night’s sleep. In countries that experience long, dark winters, it’s easy for people to get too little blue light. This leads to seasonal affective disorder (SAD) in which people feel depressed. Blue light makes us feel more alert and helps us to remember things more clearly.

對一切的藍光,我們都該避之唯恐不及?並非如此! 太陽藍光可以調節我們的生理時鐘,幫助我們一夜好眠。冬長夏短、日照不足的國家,人們接觸太陽藍光太少,容易引發季節性情緒失調,導致憂鬱。適度接觸太陽藍光,讓我們思緒更敏捷,記憶力也能提升。

智慧型手機新一代兒童週報英語能力

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