 And imagine that in a classroom, the child is in the classroom, they're trying to learn. And you would think logically, okay, well, the child's going to let us know that they can't see well and we can get them to the eye doctor. But many children don't know what they're supposed to see and they don't know to complain. They just think that the way they're seeing is the way that everyone does. And so it's really, really important that we check, that we do a comprehensive examination and ensure that children start out right and they continue that way during school.