Whether a child’s visual acuity of 4.7 can be restored is related to the cause of the disease. Pseudomyopia as well as some eye diseases have the possibility of restoration, but true myopia is more difficult to be reversed, and children can improve their visual acuity by correcting myopia with prescription lenses. For children over 4 years old, the standard value of visual acuity should be above 4.8. If the visual acuity of children above this age is 4.7, their visual acuity is lower than that of their peers. If it is caused by myopia, the child needs to go to the ophthalmology department for pupil dilation and optometry. If the child has pseudomyopia due to over-exertion of the eyes and prolonged close-distance reading and writing, he/she can improve his/her eyesight by taking proper rests and relaxing his/her ciliary muscles to restore orthopnea. However, if pseudomyopia is not treated in time, it can develop into true myopia. At present, true myopia cannot be reversed, and children can wear glasses to correct myopia and improve their vision. In addition to myopia, cataracts and keratitis can affect a child’s vision. Cataracts can be treated with surgery, such as cataract ultrasonography combined with IOL implantation, to improve vision. Children with keratitis can be treated with medications such as tobramycin eye drops to control inflammation and improve vision. Children with abnormal vision are advised to consult a doctor to evaluate their condition and follow the doctor’s instructions.