8 V.S.A. § 4098e
(a) As used in this section:
(e) (1) A health insurer shall permit a licensed optometrist to participate in plans or contracts providing for vision care or medical eye care to the same extent as it does an ophthalmologist.
(f) (1) An agreement between a health insurer and an optometrist or ophthalmologist for the provision of vision services to plan members or subscribers in connection with coverage under a stand-alone vision care plan or other health insurance plan shall not require that an optometrist or ophthalmologist provide services or materials at a fee limited or set by the plan or insurer unless the services or materials are reimbursed as covered services under the contract.
(4) (A) A vision care plan or other health insurance plan shall not restrict or otherwise limit, directly or indirectly, an optometrist’s, ophthalmologist’s, or independent optician’s choice of or relationship with sources and suppliers of products, services, or materials or use of optical laboratories if the optometrist, ophthalmologist, or optician determines that the source, supplier, or laboratory that the optometrist, ophthalmologist, or optician has selected offers the products, services, or materials in a manner that is more beneficial to the consumer, including with respect to cost, quality, timing, or selection, than the source, supplier, or laboratory selected by the vision care plan or other health insurance plan. The plan shall not impose any penalty or fee on an optometrist, ophthalmologist, or independent optician for using any supplier, optical laboratory, product, service, or material.
(g) (1) Except as otherwise specified in subdivision (f)(4), this section shall apply to Medicaid and any other public health care assistance program offered or administered by the State or by any subdivision or instrumentality of the State.