The causes of 0.5 vision in first grade children include amblyopia, myopia and eye diseases, which can be eliminated through general treatment and surgery. 1. Amblyopia: It is mainly due to the underdevelopment of the visual system, resulting in the dysfunction of the visual center, which leads to the phenomenon that the first-grade child’s eyesight is only 0.5. In this case, the overlay therapy can be used to balance the vision of both eyes and alleviate the condition. Secondly, if physically possible, surgery can also be performed to improve vision, commonly known as strabismus amblyopia treatment and visual deprivation amblyopia treatment. 2. Myopia: There are many causes of myopia, such as genetic factors, bad eye habits, environmental factors and so on. At the onset, it may lead to 0.5 visual acuity in first graders, which is recommended to be corrected by wearing frame glasses. 3. Eye diseases: Eye diseases such as congenital cataracts and keratitis can lead to poor vision, which need to be examined in the hospital before considering medication or surgical treatment. The eye is not yet fully developed in the pediatric stage, which is conducive to timely correction of abnormal eye function. Therefore, after the diagnosis is confirmed, active treatment should follow the doctor’s instructions.