A five year old child with 4.8 vision is usually in the normal vision range. As the human eye and vision are in the stage of gradual development, it is usually around the age of 8 that a child’s vision can develop into an adult state, which is 5.0. In the case of a 3 year old, the vision is usually in the range of 4.5 to 4.7, which is normal, and in the case of a 5 year old, the vision is probably in the range of 4.7 to 4.9, which is normal. Therefore, a five year old child’s vision of 4.8 is still in the normal range. However, the general visual acuity of 6-year-old children is more than 4.8, or about 5.0. If the child is older than 5 years old and the visual acuity is still 4.8, it is slightly lower, you can go to the ophthalmology department for further examination to conduct computerized optometry, and follow the doctor’s instructions for lens correction or visual function training, and need to be reviewed regularly. Parents are advised to guide their children to do a good job of vision protection, if the child has blurred vision, should go to the hospital in time to do optometry examination.