School screenings for vision problems are controversial.  It is true that screenings catch some vision problems, but they fall very short of catching all vision problems.  School sceenings can actually be harmful if they lead the parent to believe that their childs' eyes are normal when in fact a problem does exist.  This also applies to pediatric screenings.  There is simply no substitute for a comprehensive vision exam by an optometrist or opthalmologist.  Some states are introducing legislation requiring an eye examination from a licensed vision care specialist before a child enters school.