Okla. Stat. tit. 59, § 59-945: Discrimination between licensees by public officers and

agencies - Sending resident out of state for services.

No department, commission, board, official, employee, or agency

of the State of Oklahoma, or of any county, municipality or other

subdivision of the State of Oklahoma shall, in the performance of

its duties and functions in obtaining examination for refractions

and visual training or correction for citizens of this state

discriminate between persons licensed to perform examination for

refraction and visual training or correction within the field for

which their respective license entitle them to practice; and no such

department, commission, board, official or agency of the state,

county, municipality, or other subdivision shall send any resident

of the State of Oklahoma out of this state to receive or be

furnished such services. This section shall have no application

with respect to any person confined in the Oklahoma Medical Center.