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問健康丨手機(電子螢幕)發出的「藍光」

問健康丨手機(電子螢幕)發出的「藍光」

問:手機發出的「藍光」為何傷眼?

自然界中的可見光波長一般在400~700納米之間,人眼一般看到的400~500納米之間的光的顏色是藍色的,所以這個波段的光被稱為“藍光”。泰坦凝膠瀰漫之夜
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北京中醫藥大學東直門醫院眼科主任許家駿說,“近年來有研究發現,藍光中波長在435~450納米左右的光波比較短,能量比較大,會對人眼視網膜的色素上皮有一定的影響。”

如果藍光照射時間過長,50歲以後人眼黃斑易有變性傾向。

人眼黃斑變性會使視網膜色素上皮的功能減弱,甚至造成出血,從而導致中心視力下降。

如今,為了使電子螢幕更白、更亮,許多LED、電腦等電子產品的背景光(人造光源)中保留了大量的藍光,人們長期盯著電腦、電視、手機、平板電腦等各種電子智慧終端,會對人眼造成傷害。美國maxman增大丸
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