The standard visual acuity of a five year old child should be around 0.8 to 1.0. The standard of normal vision in children is age related. The standard value of children’s vision increases with age; 2 year olds have a visual acuity of 0.4-0.5, 3 year olds have a visual acuity of around 0.5-0.6, while 4 year olds have a visual acuity of 0.7-0.8, 5 year olds have a visual acuity of around 0.8-1.0, and children over the age of 6 years have a visual acuity of 1.0 as well as 1.0 and above. Five year olds are at a critical stage of vision development and it is recommended that they have their vision checked every six months to see how their eyes are developing. In case of visual development disorders, such as corneal inflammation and iritis, they should be treated as early as possible. Don’t let your child rub his/her eyes with his/her hands to avoid all kinds of viruses and bacteria, etc., from entering the eyes and causing infections. In daily life, help children to develop good eye habits, from childhood to protect children’s eyes to protect eyesight, pay attention to good eye protection, do not overuse of the eyes, try to avoid prolonged use of cell phones and computers, etc.. It is recommended that children with vision loss seek timely medical attention to assess their condition and follow doctor’s instructions for treatment.