Cal. Code Regs. tit. 16 § 1510
Inefficiency in the profession is indicated by the failure to use, or the lack of proficiency in the use of the ophthalmoscope, the retinoscope, the ophthalmometer (or keratometer), tonometer, biomicroscope, any one of the modern refracting instruments such as the phoroptor, refractor, etc., or the phorometer-trial frame containing phoria and duction measuring elements or a multicelled trial frame, trial lenses, and prisms, in the conduct of an ocular examination; the failure to make and keep an accurate record of findings; lack of familiarity with, or neglect to use, a tangent screen or perimeter or campimeter; and the failure to make a careful record of the findings when the need of the information these instruments afford is definitely indicated.
Cal. Code Regs. Tit. 16, § 1510
Note: Authority cited: Sections 3025 and 3025.5, Business and Professions Code. Reference: Sections 3025.5 and 3090, Business and Professions Code.