Whether or not a child with 4.6 vision is nearsighted requires an optometry test to determine, and cannot be judged solely on the basis of visual acuity. A child’s vision develops gradually from birth, generally speaking, vision can develop to over 4.6 at around 3 years old, 4.8 at around 4 years old, and 5.0 at around 5-6 years old. Therefore, if the child is currently only 3 years old, a naked eye vision of 4.6 is normal. If the child is older than 3 years old with a naked eye vision of 4.6, it is below normal, but whether or not it is caused by myopia cannot be judged solely on the basis of visual acuity; an optometry test is needed to know. Many ophthalmologic diseases can cause vision loss in children, such as myopia, astigmatism, cataract, amblyopia, etc. The specific cause must be clarified through examination before targeted treatment can be taken. Children with vision loss are advised to seek prompt medical attention to assess their condition and follow the doctor’s instructions for treatment.