Okla. Stat. tit. 59, § 59-943.2
Prescriptions for spectacles or eyeglasses - Copies
Any person who requests a copy of his prescription for
spectacles or eyeglasses, following an eye examination by a person
licensed under Sections 481 through 518 or Sections 581 through 606
of Title 59, shall be provided a written, signed copy of such
prescription. No extra charge shall be made for the prescription if
the patient chooses to take the prescription elsewhere. The
examining optometrist or physician shall not be responsible for the
accuracy of the optical materials furnished by another person.