Perfect vision does not simply mean that your child can see 20/20. Vision is the ability to take in visual information, process it, and understand what it means. It includes eyesight, tracking objects, how well the eyes work together, and focus. It includes color vision, depth perception, and peripheral vision. The standard eye chart in the doctor's office, or the school's routine vision screening only tests how well a child can recognize a black letter against a white background from 20 feet away. This is only the tip of the iceberg.