No agreement between a health carrier or other insurer that writes vision insurance and an optometrist for the provision of vision services on a preferred or in-network basis to plan members or insurance subscribers in connection with coverage under a stand-alone vision plan, medical plan, health benefit plan, or health insurance policy shall require that an optometrist provide optometric or ophthalmic services or materials at a fee limited or set by the plan or health carrier unless the services or materials are reimbursed as covered services under the contract.