(1) As used in this part:

  (a) “Optometrist” means an individual licensed under this article to engage in the practice of optometry.

  (b) “Practice of optometry” means 1 or more of the following, but does not include the performance of invasive procedures:

  (i) The examination of the human eye to ascertain the presence of defects or abnormal conditions that may be corrected, remedied, or relieved, or the effects of which may be corrected, remedied, or relieved by the use of lenses, prisms, or other mechanical devices.

  (ii) The employment of objective or subjective physical means to determine the accommodative or refractive conditions or the range of powers of vision or muscular equilibrium of the human eye.

  (iii) The adaptation or the adjustment of the lenses or prisms or the use of therapeutic pharmaceutical agents to correct, remedy, or relieve a defect or abnormal condition or to correct, remedy, or relieve the effect of a defect or abnormal condition of the human eye.

  (iv) The examination of the human eye for contact lenses and the fitting or insertion of contact lenses to the human eye.

  (v) The employment of objective or subjective means, including diagnostic pharmaceutical agents by an optometrist who meets the requirements of section 17412, for the examination of the human eye for the purpose of ascertaining a departure from the normal, measuring of powers of vision, and adapting lenses for the aid of those powers.

  (c) “Diagnostic pharmaceutical agent” means a topically administered prescription drug or other topically administered drug used for the purpose of investigating, analyzing, and diagnosing a defect or abnormal condition of the human eye or ocular adnexa.

  (d) “Therapeutic pharmaceutical agent” means 1 or more of the following:

  (i) A topically administered prescription drug or other topically administered drug used for the purpose of investigating, analyzing, diagnosing, correcting, remedying, or relieving a defect or abnormal condition of the anterior segment of the human eye or for the purpose of correcting, remedying, or relieving the effects of a defect or abnormal condition of the anterior segment of the human eye.

  (ii) A topically or orally administered antiglaucoma drug.

  (iii) An orally administered prescription drug or other orally administered drug used for the purpose of investigating, analyzing, diagnosing, correcting, remedying, or relieving a defect or abnormal condition of the anterior segment of the human eye and adnexa or for the purpose of investigating, analyzing, diagnosing, correcting, remedying, or relieving the effects of a defect or abnormal condition of the anterior segment of the human eye and adnexa that is administered by an optometrist who has completed 50% of the continuing education hours required for renewal of a license in the category of pharmacological management of ocular conditions.

  (e) “Drug” means that term as defined in section 17703, but does not include a controlled substance as defined in section 7104 and included in schedule 2 under section 7214, an oral cortical steroid, or a prescription drug. However, drug does include a controlled substance included in schedules 3, 4, and 5 under sections 7216, 7218, and 7220, respectively, and dihydrocodeinone combination drugs.

  (f) “Prescription drug” means that term as defined in section 17708, but does not include a controlled substance as defined in section 7104 and included in schedule 2 under section 7214 or an oral cortical steroid. However, prescription drug does include a controlled substance included in schedules 3, 4, and 5 under sections 7216, 7218, and 7220, respectively, and dihydrocodeinone combination drugs.

  (g) “Physician” means that term as defined in section 17001 or 17501.

  (h) “Invasive procedures” means all of the following:

  (i) The use of lasers other than for observation.

  (ii) The use of ionizing radiation.

  (iii) The use of therapeutic ultrasound.

  (iv) The administration of medication by injection.

  (v) Procedures that include an incision.

  (2) In addition to the definitions in this part, article 1 contains general definitions and principles of construction applicable to all articles in this code and part 161 contains definitions applicable to this part.