Nearsightedness can be prevented by practicing good eye habits, appropriate outdoor activities and regular eye examinations. 1. Develop good eye habits. Minimize the use of electronic products, especially for children during the growth and development period, it is generally recommended that the continuous use of electronic products be limited to one hour. Reading and writing for a long time should be intermittent breaks, and should be carried out in a place with sufficient natural light. Ensure proper reading and writing postures. These behaviors can relieve eye fatigue and effectively prevent myopia. 2. Appropriate outdoor activities. Research has shown that under the action of natural light, it can promote the release of dopamine from the retina, which can effectively alleviate the occurrence of myopia, so you should do appropriate outdoor activities every day so that your eyes can better absorb natural light. 3. Regular eye examination. It is usually recommended to have vision checkups at least once a year or once every six months, so that eye diseases and vision changes can be detected in a timely manner. The above measures are crucial in preventing myopia, which is difficult to cure once the eyes are nearsighted, so it is important to intervene early.