The main behaviors that harm children’s eyes include incorrect study posture, prolonged eye use, and lack of outdoor activities. 1. Incorrect learning posture: children usually study in an incorrect posture, often hunchback or like to lie on the table to read and write, which will lead to the eyes for a long time can not be close to see things. The eye muscles can not be relaxed in time to regulate, may lead to excessive eye fatigue, the eye damage is relatively large. 2. Prolonged use of the eyes: prolonged viewing of computers and cell phones may lead to excessive eye fatigue in children. The lens as well as the muscles of the eye continue to be tense and cannot be relaxed, which is also a common behavior that harms the eyes. 3. Lack of outdoor activities: children lack of outdoor activities, not able to receive ultraviolet radiation, the child’s eyes can not get exercise, long-term may also hurt the eyes. There may be other behaviors in daily life that harm children’s eyes. Usually must pay attention to urge children to develop good eye habits.