Children’s close attention time is related to the items of attention, if the book, not more than 30 minutes each time; if the electronic products, not more than 20 minutes each time; the total time should not be more than 1 ~ 1.5 hours. Because for children, the eyes are still in the stage of growth and development. If the eye habits are not good, especially for a long time close to see something, it is likely to lead to eye fatigue, but also easy to form myopia. Therefore, it is recommended that the time of each close gaze should not exceed 30 minutes, and in the case of electronic products, such as cell phones or computers, it should generally not exceed 20 minutes; at the same time, in a day, the total time of close gaze is recommended not to exceed 1 ~ 1.5 hours. It should be noted that, in addition to the need to pay attention to the time of close attention, the intensity of light, eye hygiene may also affect the health of children’s eyes, so parents should pay attention to develop children’s good eye habits.