Playing with the phone before bed has been a habit of many people, this habit will give our eyesight, skin and intelligence are very harmful, cell phone signal will cause interference with the brain, artificial light will also inhibit the secretion of melatonin, making it difficult to sleep. If emotional, sad, excited will make our sleep quality decreased. The following are the top ten hazards of playing with cell phones before bed: 1, leading to dry eyes A new study published in the Journal of Optometry and Vision Science found that when people read text information or surf the Internet through cell phones, their eyes will be closer than holding a book or a newspaper in their hands, which means that the eyes focus on cell phone graphics more effort, prolonged use of cell phones to browse the Web will lead to dry eyes. In addition, it is also more likely to lead to headaches and eyestrain. So, when you see this information on Lifehacker.com, I hope you will think about your health and pass it on to each other. 2, lead to blurred vision Staring at the phone for a long time in a dark room, the light from the phone will fatigue the eye muscles and affect the ability to focus, leading to blurred vision. Initially it may only be a temporary visual fatigue, but in the long run it will become permanent and eventually lead to myopia and possibly even astigmatism. 3, leading to vision deviation The degree of the two eyes is the same when people are born, and long-term lying in bed to play cell phone, a month will cause the left and right eye vision deviation. Because the left and right horizontal lying on the left and right eye compression force is the largest, so a month will cause the left and right eye vision deviation, the pillow on the eye compression caused by insufficient blood supply, a long time the eyes will have a sense of expansion, short-term image overlap, 4, affect vision left and right horizontal lying on the left and right eye compression force is the largest, so go on not out of a month will cause the left and right eye vision deviation (why some people with glasses left and right The degree is not the same, and people are born with the same degree in both eyes, is because some people like to lie across to play cell phones, reading novels, reading cartoons.) The pressure of the pillow on the eyes caused by insufficient blood supply, a long time the eyes will have a sense of expansion, short-lived image overlap, this is not drops of eye drops can be good! So really ah, for the sake of our eyes really must not! 5, affect the biological clock in bed for more than an hour using cell phones, tablets or some other electronic products that emit light will reduce the total number of people generate melatonin about 22%. Once people’s melatonin is suppressed to this extent, then people’s physiological cycle will also be affected, the direct effect is to keep people in light sleep, or even greatly reduce people’s sleep time. In other words, after playing with the phone for 1 hour, you may have to play on 3 hours, because you can not sleep. 6, affect intelligence Mobile phone radiation is relatively large, there are screen radiation and body signal receiving radiation 2. The blood in the human body is required to maintain a balance of positive and negative charges, the screen radiation will have a subtle effect on this balance, although not large, but still has a bad effect. Over time, it will cause a decrease in the body’s immunity, easy fatigue, nausea, and other adverse reactions. Long hours on the phone will also affect vision. It is recommended to play with the phone less at night when you sleep. In addition, the cell phone signal reception radiation will affect the human brain nervous system, over time will make intelligence reduced. 7, finger numbness frequent keystrokes, sore thumbs. Excessive use of cell phones, frequent text messages will lead to soreness, numbness or swelling of the thumb and other discomfort symptoms. 8, chronic strain injury excessive neck droop, the body does not naturally bend, the neck is increasingly tilted forward. This makes the human neck sternocleidomastoid muscle is then constantly stretched forward, after a long time will be in a state of chronic congestion, over time, easy to compress the vertebral artery and induce cervical spondylosis, resulting in chronic strain injury. 9, cervical anti-bow We normal people have cervical spine physiological bending, if there is no physiological bending, or even bending in the opposite direction, called “anti-bow”. The “cervical arch” is the most common pathological basis of cervical spondylosis, high pillow can make the head forward flexion, increasing the stress of the lower cervical spine, with the possibility of accelerating cervical degeneration. And lying high back to watch TV and long hours on the Internet, lying down to play cell phones and other bad habits, pulling the cervical spine for a long time, will also lead to its curve convexity is gradually reduced, straighten or even anti-bow. 10, damage to the skin cell phone radiation to people, this actually can not be underestimated. People use the phone with the face is very close to the distance, will have a certain impact on the skin, can not determine whether it will grow spots, but certainly not good for the skin, prone to acne. These are the top ten hazards of playing cell phones before bed, if you still have this habit students, please change it as soon as possible to prevent our life, work and body to bring harm.