All persons, residing in the State of Oklahoma, between the ages of six (6) and twenty-one (21) years, whose vision is so defective as to prevent them attending the public schools, and who are of such physical, mental, and moral character as to enable them to pursue any one or all of the courses of study taught in this school, are eligible; provided, persons may be continued in said school after passing the age of twenty-one (21), or persons, under six (6) and over twenty-one (21), may be admitted as pupils in said school at the discretion of the superintendent and faculty.

Laws 1913, c. 37, p. 73, § 4.