Maryland Code, Health Occupations § 11-206

(a) In connection with any investigation of charges under § 11-313 of this title, the Board may request the licensee to submit to an appropriate physical or mental examination by a licensed physician designated by the Board.

(b) In return for the privilege given to a licensee to practice optometry in this State, the licensee is deemed to have:

(c) At any disciplinary hearing before the Board, the failure or refusal of the licensee to submit to an examination under this section is prima facie evidence of the licensee's inability to practice optometry competently, unless the Board finds that the failure or refusal is beyond the control of the licensee.

(d) The Board shall pay the costs of any examination made under this section.

(e) Notwithstanding any provisions of this section, a licensee may present evidence to the Board of mental or physical health that conflicts or is different from that presented as a result of an examination under this section.