Temporary blindness due to smartphone use at night
The bedroom should actually be taboo for smartphones at night. The bright light of the screens confuses the human clock and can lead to sleep problems. But that is obviously not the only malfunction emanating from the small device. Because if you look at your phone for too long in the dark, you may go blind for a short period of time. A team of doctors from Great Britain is currently reporting on this in the specialist magazine “The New England Journal of Medicine”.
Bright light disturbs the internal clock
Taking the smartphone into the bedroom in the evening is a matter of course for many people. Just check your emails, read messages or send a few short messages before you go to sleep - who doesn't know that. Devices such as smartphones, tablets or laptops should actually be banned from the bedroom. Because, as scientists recently reported, the bright light of the display can quickly lead to sleep problems.
Extensive tests bring no explanation
However, looking at your smartphone at night can obviously have other serious consequences. Because like Dr. Gordon Plant from Moorfield’s Eye Hospital and his colleagues report that two cases from England have shown that cell phone use in the dark can lead to brief blindness. The two women, aged 22 and 40, had therefore always experienced a temporary blindness in one eye, which lasted up to 15 minutes. Extensive tests followed, but the results of the eye and cardiovascular exams were normal. The examination of the vitamin A level, ultrasound, MRA and a thrombophilia screening did not reveal any abnormalities, according to the experts in their specialist article.
Eyes adapt to different lighting conditions
First a survey by the eye specialist Dr. Gordon Plant literally shed light on the dark: "I simply asked her, 'What exactly did you do when this happened?'" Said the doctor, according to an article in the "Guardian". It turned out that the women went blind for a short time after looking at the bright smartphone screen in the dark and lying in bed for a few minutes. That doesn't sound unusual at first - but due to the side lying position, they had only looked with one eye, since the other was covered by the pillow.
"So you have an eye that adapts to the light because it looks at the phone and an eye that adapts to the dark," explains Dr. Plans. After the women had put the smartphone aside, they could no longer see anything with the “cell phone eye”. According to the doctor, this is due to the fact that "it takes many minutes to catch up with the other eye, which is adapted to the darkness." Accordingly, the doctors conclude that "smartphone blindness" is ultimately harmless and, above all, easily avoidable , said a message from Moorfield Eye Hospital. Because if you don't want to do without your cell phone in the dark bedroom, you should at least always look at the display with both eyes. (No)