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Nocturnal smartphone use: temporarily blind in one eye
The smartphone has long been an integral part of everyday life for many people. Even though the devices make our lives easier in many areas, frequent use also poses health risks. It can even lead to temporary blindness, scientists report.
Not without my cell phone
Chat with friends, surf the Internet, play, shop or even search for a partner for life: the smartphone is part of everyday life for most people. The constant use also harbors some health risks. For example, nearsightedness increases due to constant smartphone use. In addition, people who look at the bright display in the dark can even go blind for a short time. British scientists have observed this worrying effect in two patients.
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 can go blind for a short period of time. A team of doctors from Great Britain reports about this in the specialist magazine "The New England Journal of Medicine".
Tests don't provide an explanation
The fact that the glaring light of the display can rob us of sleep at night is not the only consequence of using the cell phone at night. Because like Dr. According to Gordon Plant from Moorfield’s Eye Hospital and his colleagues, 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 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 only looked with one eye, since the other was covered by the pillow.
"Smartphone blindness" is easy to avoid
"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, ad)