C.R.S. § 22-1-116

The sight and hearing of all children in the kindergarten, first, second, third, fifth, seventh, and ninth grades, or children in comparable age groups referred for testing, shall be tested during the school year by the teacher, principal, or other qualified person authorized by the school district. Each school in the district shall make a record of all sight and hearing tests given during the school year and record the individual results of each test on each child’s records. The parents or guardian shall be informed when a deficiency is found. The provisions of this section shall not apply to any child whose parent or guardian objects on religious or personal grounds.