8-year-old child 4.9 vision, basically normal, generally do not wear glasses, daily life will not be affected, you can pay attention to eye hygiene, do eye exercises and other ways to restore. 8-year-old child 4.9 vision generally do not need to wear glasses, the child is still in the development stage, pay attention to eye hygiene, pay attention to reading, writing homework posture, do not play computer or watch TV for a long time, avoid excessive eye use. Usually do eye exercises, massage eye points, is conducive to promoting blood circulation in the eyes and head, regulating muscles, improve eye fatigue, prevent myopia and other eye diseases. Excessive use of eyes for a long time, so that the eyes are often in a state of tension, and over time will become myopia. Eye exercises are a comprehensive preventive measure against myopia, which is based on the principles that cause myopia. Regular vision checkups are also needed, and if vision loss continues, active intervention is necessary.