An 8-year-old child with visual acuity of 4.5 and 4.3 in both eyes indicates a loss of vision and needs to be examined for refractive errors, amblyopia, cataracts, etc., and then have his or her vision improved by glasses, amblyopia training, or surgery. Normally a child’s vision develops and improves with age after birth and develops to the same level of 5.0 as normal at around 6 years of age. At present, an 8 year old child’s eyesight is only 4.5 and 4.3 in both eyes, which is significantly lower than normal. It is necessary to take the child to the ophthalmology department of the hospital, and the doctor will conduct a professional examination, usually need to do slit lamp microscopy, funduscopy, optometry, etc. to find out the causes of vision loss, and refractive error is the most common cause. The most common cause of refractive error is refractive error. Simple refractive error can be corrected by wearing eyeglasses; if the child has amblyopia, amblyopia training is needed to stimulate the visual development to improve the vision; if there is a cataract, it needs to be treated by surgery. It is recommended that the patient go to the ophthalmology department of the hospital in time, and the doctor will formulate a plan after a comprehensive examination.