As used in this article, the term:

(1) "Covered person" means an individual enrolled in a health benefit plan or an eligible dependent thereof.

(2) "Covered services" means those health care services which a health care insurer is obligated to pay for or provide to a covered person under a health benefit plan.

(3) "Eye care" shall mean those health care services and materials related to the care of the eye and related structures and vision care services which a health care insurer is obligated to pay for or provide to covered persons under the health benefit plan.

(4) "Health benefit plan" means any public or private health plan, program, policy, or agreement implemented in this state which provides health benefits to covered persons, including but not limited to payment and reimbursement for health care services.

(5) "Health care insurer" means an entity, including but not limited to insurance companies, hospital service nonprofit corporations, nonprofit medical service corporations, health care corporations, health maintenance organizations, and preferred provider organizations, authorized by the state to offer or provide health benefit plans, programs, policies, subscriber contracts, or any other agreements of a similar nature which compensate or indemnify health care providers for furnishing health care services.