A 5-year-old with normal vision of 4.9 should also be given regular eye exams to prevent myopia. 5-year-old children with normal vision, it is best to check the refractive error (farsightedness reserve) every six months, 5-year-old children’s normal farsightedness is about 150 degrees, if farsightedness is less than 150 degrees, indicating that the farsightedness reserve is insufficient, prone to nearsightedness; farsightedness is greater than 150 degrees, may not have reached the normal standard, prone to amblyopia and so on, amblyopia should be active in the treatment. 5-year-old children should pay attention to cultivate correct eye habits, correct sitting posture, not in the dark environment, reading, writing, etc., more eye exercises, more look away, to avoid eye fatigue, can prevent the occurrence of myopia. 5-year-old children with normal vision, regular checkups in regular hospitals can be, if there is any abnormality should be treated in a timely manner, so as not to delay the condition.