Cal. Bus. & Prof. Code § 3006

As used in this chapter, the term “advertise” and any of its variants include the use of a newspaper, magazine, or other publication, book, notice, circular, pamphlet, letter, handbill, poster, bill, sign, placard, card, label, tag, window display, store sign, radio announcement, or any other means or methods now or hereafter employed to bring to the attention of the public the practice of optometry or the prescribing, fitting, or sale, in connection therewith, of lenses, frames, or other accessories or appurtenances.