Kansas Statute(K.S.A. 72-6242) requires Kansas schools to provide free vision screenings to each student no less than once every two years

(a) (1) Each school board shall provide basic vision screening without charge to every pupil enrolled in each school under the governance of such school board not less than once every two (2) years. All such tests shall be performed by a teacher or some other person designated by the school board. The results of the test and, if necessary, the desirability of examination by a qualified physician, ophthalmologist or optometrist shall be reported to the parents or guardians of such pupils. Information relating to the desirability of examination by a qualified physician, ophthalmologist or optometrist shall not show preference in favor of any such professional person.