Smartphone blindness happens when people lie on their side at night, with one eye against the pillow and the other staring at the smartphone screen. While one eye adjusts to the dark, the other eye gets used to the bright light of the high-resolution screen. But when they roll over and open both their eyes, the eye which has been staring at the screen cannot cope with the darkness of the room. Subsequently, with both eyes uncovered in the dark, the light-adapted eye is perceived to be "blind".

人们晚上侧躺着看手机，一只眼靠着枕头，另一只眼盯着手机屏幕的时候会出现“智能手机眼盲症”。一只眼（靠着枕头的那只）适应了黑暗的环境，而另一只眼（看手机的那只）则适应了高分辨率屏幕发出的亮光。当你翻身把两只眼睛都完全睁开的时候，之前盯着手机屏幕的那只眼睛无法适应房间内黑暗的环境。结果，两只眼同时在黑暗环境中的时候，适应了光亮的那只就会出现“眼盲”的情况。

It usually takes several moments for the eyes to adjust, leading people to believe they are suffering from a severe problem.

通常，这种情况需要一段时间让眼睛来慢慢适应，有些人就会以为自己得了什么重病。