什么是蓝光?

蓝光是可见光谱的一部分,在我们的一生中,我们的眼睛会暴露于各种可见光和看不见的光。大多数蓝光不仅来自于自然光,而且还来自家中的电灯、办公室中的荧光灯和LED灯、屏幕电视和计算机屏幕、手机以及其他数字设备。

 

蓝光如何影响我们的眼睛

在光谱上,蓝光最接近看不见的紫外线,几乎所有可见的蓝光都穿过角膜和晶状体并到达视网膜。早期研究显示过多地暴露于蓝光可能导致:

 

数码眼疲劳

来自电脑屏幕和数码设备的蓝光会降低对比度,从而导致数码眼疲劳。疲劳,眼睛干涩,光线不足或坐在电脑前可能会引起眼睛疲劳。眼睛疲劳的症状包括眼睛酸痛或发炎和难以集中。

 

视网膜损伤

研究表明随着时间的推移持续暴露于蓝光可能会导致视网膜细胞受损。这可能会导致视力问题,例如与年龄有关的黄斑变性。

 

叶黄素和玉米黄质如何防止蓝光

叶黄素和玉米黄质是与β-胡萝卜素属于同一类营养素的两种类胡萝卜素,但是由于它们在食用时会沉积在视网膜中,因此被特别称为黄斑类胡萝卜素。叶黄素和玉米黄质也具有有效的抗氧化作用,并在保护视网膜免受累积性损伤和氧化应激(可能引起与年龄有关的眼睛问题)方面发挥作用。

叶黄素和玉米黄质可以过滤有害的高能量蓝光波长,并有助于保护和维持眼睛中的健康细胞。测量视网膜黄斑区域中叶黄素和玉米黄质的量,作为黄斑色素光密度(MPOD)。最近,MPOD已成为预测疾病和视觉功能的有用生物标记。

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