Many people like to play mobile phones in bed. In fact, this habit is very bad, which is harmful to people's neck and eyes. What's the difference between lying and sitting? Let's get to know each other.
0 1 It is difficult to control the distance between the mobile phone and the eyes and the viewing angle. When lying flat, the brain is locally compressed and the blood flow is not smooth.
When reading a book normally, people usually have two eyeballs to play a visual role at the same time. The burden borne by the two eyeballs is basically the same and basically horizontal. If you are lying down reading a book or watching a mobile phone, the situation is very different.
When lying down and watching the mobile phone, the two eyeballs are not on the same horizontal line, or tilted up and down, or tilted left and right, and the position of the connecting focus is also off track, which makes the eyes bear different burdens and the eyes are extremely tired. After a long time, there will be obvious adverse changes in the axial length.
When reading while lying down, it is difficult to keep the distance between the eyes and the book above 30 cm, and the eyes bear the triple burden of posture, sight and distance. If it is not changed, it will lead to myopia or other eye abnormalities. Therefore, lying down reading or watching TV is easy to cause eye fatigue. If the time is a little longer, the eyes will feel dry, which will cause visual damage in severe cases.
If you play with your mobile phone sideways, even if you hold it with both hands, it will cause astigmatism.