No agreement between an insurer or prepaid vision plan and a vision care provider shall restrict or limit, either directly or indirectly, the provider's choice of sources and suppliers of services or materials or use of optical labs provided by the vision care provider to an enrollee. Vision care providers shall not receive reduced reimbursement for using labs and suppliers that the provider chooses to best serve patient outcomes.
Okla. Stat. tit. 36, § 6976