Well, it is very important to see an optometrist for everyone, not just children. And also, through eye exam, you can know your eye condition and have them to treat as soon as possible. Generally speaking, Beginning at age 3, children should have their vision checked every year by their pediatrician at their regular well-child visits, or by an optometrist. Certain factors may cause a child to be more at risk for eye conditions and diseases, and may warrant earlier or more frequent vision screening tests. These include having been born prematurely, developmental delays, having crossed eyes, having sustained an injury to the eye, and having a family history of eye diseases. your kid should see an optometrist now.