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For two women in the United Kingdom, mysterious vision problems that happened only at night or early in the morning turned out to have a rather innocuous cause: looking at a smartphone in the dark. 英国的两位女士只在夜晚或者是早上出现了神秘的视力问题，结果是由一个相当无伤大雅的原因引起的——那就是在黑暗中看手机。 In the first case, a 22-year-old woman told her eye doctor that she had trouble seeing out of her right eye at night while she was in bed. These episodes happened multiple times a week for a year. Each time, she said she could only see the outlines of objects with her right eye, although her vision was fine in her left eye, and in both eyes the following day. 在第一个案例中，一位22岁的女士告诉她的眼科医生说，她的右眼在每晚躺在床上的时候看不清。这些现象在一年之中每周要发生很多次。每次她都说，她的右眼只能看出事物的轮廓，尽管她的左眼视力很好，第二天两只眼睛的视力就全部恢复了。 | 
