If a 7-year-old child’s visual acuity of 0.8 is slightly lower than normal, it is recommended to go to the hospital for a dilated eye examination to clarify the cause of the problem. Seven-year-old children’s normal vision is generally 1.0 or 1.0 or more, if the children’s vision is 0.8, may be caused by refractive error or amblyopia and other eye diseases, should go to the hospital ophthalmology department for pupil dilation and optometry, to clarify the condition into the targeted treatment. In addition, eye fatigue caused by excessive eye use may also cause slightly poorer vision, the child should pay attention to reasonable rest, reduce the use of electronic devices, adhere to do eye exercises and other methods to relieve visual fatigue, in order to improve vision. 7-year-old child vision 0.8, please go to the regular hospital ophthalmology consultation in a timely manner, under the professional guidance of the doctor to choose the appropriate treatment, so as not to delay the condition.