Tenn. Code Ann. § 56-31-124

Each nonprofit vision service corporation may contract with its subscribers for vision services that may be from time to time provided under the nonprofit vision service plan adopted by the corporation. The rates charged by the nonprofit vision service corporation to its subscribers shall be consistent with the proper conduct of its business and the interest of the public and shall be subject to the approval of the commissioner. Nothing contained in this chapter or in any nonprofit vision service plan shall affect the ordinary professional relationship between the person rendering vision services under the plan and the subscriber to whom the services are rendered, and no action based upon or arising out of the relationship or relating to vision services rendered pursuant to a nonprofit vision service plan shall be maintained against the nonprofit vision service corporation operating the plan.