(a) The practice of optometry is defined as the employment of any and all means for the examination, diagnosis, and treatment of the human visual system, the human eye, and its appendages without the use of surgery, including, but not limited to: the appropriate use of ocular pharmaceutical agents; refraction and other determinants of visual function; prescribing corrective lenses or prisms; prescribing, dispensing, or management of contact lenses; vision therapy; visual rehabilitation; or any other procedures taught in schools and colleges of optometry approved by the Department, and not specifically restricted in this Act, subject to demonstrated competency and training as required by the Board, and pursuant to rule or regulation approved by the Board and adopted by the Department. A person shall be deemed to be practicing optometry within the meaning of this Act who:
(1) In any way presents himself or herself to be qualified to practice optometry.(2) Performs refractions or employs any other determinants of visual function.(3) Employs any means for the adaptation of lenses or prisms.(4) Prescribes corrective lenses, prisms, vision therapy, visual rehabilitation, or ocular pharmaceutical agents.(5) Prescribes or manages contact lenses for refractive, cosmetic, or therapeutic purposes.(6) Evaluates the need for, or prescribes, low vision aids to partially sighted persons.(7) Diagnoses or treats any ocular abnormality, disease, or visual or muscular anomaly of the human eye or visual system.(8) Practices, or offers or attempts to practice, optometry as defined in this Act either on his or her own behalf or as an employee of a person, firm, or corporation, whether under the supervision of his or her employer or not. Nothing in this Section shall be interpreted (A) to prevent a person from functioning as an assistant under the direct supervision of a person licensed by the State of Illinois to practice optometry or medicine in all of its branches or (B) to prohibit visual screening programs that are conducted without a fee (other than voluntary donations), by charitable organizations acting in the public welfare under the supervision of a committee composed of persons licensed by the State of Illinois to practice optometry or persons licensed by the State of Illinois to practice medicine in all of its branches.