The causes of myopia: parental inheritance Myopia over 600 degrees has a high probability of inheritance to their children, high myopia belongs to the invisible inheritance; parental single high myopia inheritance probability is low, if both sides are highly myopic, the probability of inheritance is close to 100 percent. The human body can not use any organ for a long time, in the good things for a long time also easy to lesions, mainly affecting the youth eye muscles for a long time can not relax, resulting in a state of spasm, teenagers are generally obsessed with the Internet myopia has a high probability. Work environment light is too strong or too weak light is too strong will stimulate the eyes, light is too weak will make the eyes fatigue, both of which will make the eyes produce serious fatigue, eyes do not get a good regulation for a long time, naturally in the function of slack, a long time will lead to myopia. Sitting in the car and walking to play with the phone Mobile reading is very bad for young people, not only to read to get the content of the difficulty, but also to increase the burden on the eyes, long-term so it may cause myopia. Lying down to play cell phones and read books Many young people today have a lazy cancer trend, play cell phones and read books like lying down to see, keep the distance and sight is not at the same level, easy to aggravate the eye fatigue, over time by the body memory gradually formed myopia. Insufficient sleep at night, the brain does not get enough rest, the whole body fatigue can not be relieved in time, resist fatigue learning and homework on the eyes is also very harmful, prompting myopia, is also one of the main manifestations of the current urban nightlife, sleep during the day in the middle of the night is still partying.