Okla. Stat. tit. 59 § 159.2
It shall be unlawful to make, furnish, correct, change, or fit any of the following if moulded for the foot or part of the foot of a specific person, as distinguished from persons generally, to wit: shoes for the purpose of diagnosing, correcting, relieving, treating, aiding, controlling, or alleviating ailments, diseases, diseased conditions, deformities, injuries, or abnormalities of the foot or feet of the specific person, except upon the prescription of a medical doctor, podiatric physician, osteopathic physician duly licensed under the laws of this state, or to offer so to do, or for any one other than such medical doctor, podiatric physician or osteopathic physician to prescribe any thereof for any such purpose.
Okla. Stat. tit. 59, § 159.2