A 4 year old with 4.5 vision is not normal, a 4 year old should have about 4.9 vision, 4.5 vision is lower than normal for their age group and requires further optometric testing for vision. The child will need to have an atropine slow dilated optometry exam to really understand if there is a problem with the child’s vision. Examinations such as fundus and intraocular pressure are also performed to rule out organic eye pathology. Children with vision loss due to refractive errors such as hyperopia and myopia can improve their vision by correcting the refractive errors with eyeglasses. In addition to wearing eyeglasses, patients should also pay attention to avoid facing electronic products for a long time, and sit in a correct posture when studying, so as to use the eyes correctly. It is recommended that children with vision loss seek medical attention in a timely manner to have their condition evaluated and treated under the guidance of a medical professional.