The scope of a Physician Assistant is limited by their supervising physician. Whatever medical specialty a physician practices
(e.g., general practice, cardio-thoracic surgery, dermatology, etc.) limits the Physician Assistant's scope of practice. The Delegation of
Services Agreement between the Physician Assistant and the supervising physician further defines exactly what tasks and procedures a physician
is delegating to the Physician Assistant. These tasks and procedures must be consistent with the supervising physician's specialty or usual and
customary practice and with the patient's health and condition.
Before authorizing a Physician Assistant to perform any medical procedure, the physician is responsible for evaluating the Physician Assistant's
education, experience, knowledge, and ability to perform a procedure safely and competently. In addition, the physician should verify that
the Physician Assistant has a current California license issued by the Physician Assistant Board.
A Physician Assistant may not perform any of the following medical services pursuant to Business and Professions Code (BPC) section 3502 (d):
- The determination of the refractive states of the humman eye, or the fitting or adaptation
of lenses or frames;
- The prescribing or directing the use of, or using any optical device in connection
with ocular exercises, visual training or orthoptics;
- The prescribing, fitting or adaptation of contact lenses and
- The practice of dentistry or dental hygiene or the work of a dental auxiliary.
A Physician Assistant may perform a routine visual screening pursuant to BPC section 3501(h) as a noninvasive, nonpharmacological simple
testing for visual acuity, visual field defects, color blindness, and depth perception.