Children with visual acuity of 4.7 is usually not serious if they are three to four years old, but if they are four years old or older it may affect their vision and be more serious. The visual function of children between three and four years old has not yet developed soundly, naked eye visual acuity of 4.7 do not need to worry too much, will gradually develop to normal with age, but still need to develop the habit of protecting eyesight from childhood. If the naked eye vision of children aged four and above is 4.7, it is on the low side, which may be due to refractive errors such as myopia, astigmatism, hyperopia, etc., resulting in light rays passing through the retina and not landing on the focal point, thus affecting the child’s naked eye vision. In addition, cataracts and glaucoma can also cause vision loss and require prompt medical attention. It is recommended that children with vision loss seek medical attention to evaluate their condition and follow the doctor’s instructions for treatment.