手机中的“护眼模式”真的能有效保护眼睛吗?
现在,大部分手机里面都会有“护眼模式”,主要是让用户在使用手机时,看到的画面更柔和,让眼睛不那么容易感到疲劳,包括 iPhone 也不例外。
我们可以打开 iPhone “设置”-“显示与亮度”,在此界面中开启“原彩显示”或“夜览模式”,将屏幕显示调整为更加自然、柔和的色调,减少屏幕对眼睛的刺激:

不过,这些设置是否能真的保护我们眼睛吗?
我们可以先了解下什么是手机蓝光:所谓的蓝光并不是蓝色光,是电脑和手机等 LED 屏幕产生的光线,是可视光范围中波长在 400—500 纳米之间的光。其中,波长在 450-470 纳米之间的短波蓝光对视网膜的危害程度最大。

蓝光对眼睛的伤害
蓝光能够穿透眼睛的角膜和晶状体,到达视网膜,诱发眼睛疲劳、干眼、生物钟紊乱等不适症状,尤其在昏暗环境下影响更大。

现在智能手机的显示屏大多是用 LED 的RGB 三色,“护眼模式”其实就是通过修改屏幕色温,让蓝光减少,红光与绿光一起融合来形成较柔和的黄光屏幕模式,以此来降低蓝光对眼睛的伤害。
当开启“护眼模式”时,手机屏幕就偏向暖黄色,在一定程度上减少了蓝光,减轻了蓝光对于眼睛的伤害。
但是,当我们用眼习惯、用眼距离、周围环境光照强度等其他因素并没有改变,而且手机屏幕变暗之后,眼睛的负担反而更重。所以说单纯依靠手机中的“护眼模式”并不能真正起到作用。
所以,在使用 iPhone 的时候,除了可以开启“夜览模式”与“原彩显示”之外,还要注意使用手机的习惯:
1. 合理计划使用手机的时间,尽量避免长时间注视手机屏幕;
2. 在漆黑环境下减少低亮度的观看时间,如果有深夜阅读习惯,最好打开柔和光源来中和频闪;
3.合理调整手机屏幕亮度,使用色调柔和背景色的手机壁纸和主题。
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