The prevalence of myopia among our youth is as high as 50% to 60%, which has reached 1.5 times the world average of 22%, and the number of myopic eyes is the first in the world. Myopic arc has become the most common fundus changes in myopia, the root cause is the bad habits of life and work, so it is especially important to develop good habits to prevent myopic arc. Daily prevention: 1, usually pay attention to nutrition, eat more fresh vegetables, do not favor food. 2, reading books or newspapers, eyes and written to maintain 30 centimeters, 45 degree angle, and avoid prolonged close use of the eyes. 3, avoid reading books and newspapers in cars, places with insufficient light or strong light, and when reading books the light source should be evenly projected from behind or to the left obliquely. 4.Avoid using unclean towels or public face washing utensils to prevent infection. 5.Do enough sleep and outdoor activities, and look at green plants from time to time. 6.Read or write for half an hour to one hour, should rest for a few minutes, look at the distance, close the eyes to rest or do gymnastic exercises. 7.Don’t watch TV, play computer or video games for a long time, and keep your eyes away from the fluorescent screen. 8.Regularly make vision checkups and treat problems promptly.