Me. Rev. Stat. tit. 32, § 19308

A licensee shall be held to the same standard of care in diagnosis, treatment and management of patient care as that degree of skill and proficiency commonly exercised by a physician with a specialty in eye care in this State. A licensee shall ensure that the services provided are consistent with the licensee's scope of practice, including the licensee's education, training, experience, ability, licensure and certification.