The visual acuity of a 6-year-old child is 4.9 in both eyes. Whether it is normal or not needs to be judged in conjunction with other examination results, such as refractive status and eye axis. If no refractive error or other abnormal changes are found after a routine eye examination, the vision is generally within the normal range, and regular checkups to monitor the development of the eyes will be enough as prescribed by the doctor. Normally, we should do a good job of eye care, correct sitting posture, avoid reading and writing in dim light, less look at electronic products, etc.; do eye exercises at the right time, more far away, to avoid eye fatigue, can prevent the occurrence of myopia. 6-year-old children left and right eye vision is 4.9, whether it is normal also need to improve other medical examination and later comprehensive assessment, do not judge on their own.