California Code, Business and Professions Code - BPC § 2553.5

(a) A registered spectacle lens dispenser may fit and adjust spectacle lenses and frames or take facial measurements in any of the following locations:

(b) A registered spectacle lens dispenser who fits and adjusts spectacle lenses at a health facility or business location shall provide to the patient written information disclosing the registrant's regular business address, certificate of registration number, phone number, and the name and phone number of the person designated by the licensee to receive complaints and inquiries, as specified in Section 2554.

(c) Nothing in this section shall be deemed to permit a registered contact lens dispenser to fit or adjust contact lenses at a health facility or at a business location, as defined in subdivision (e).

(d) A registered spectacle lens dispenser may fit and adjust spectacle lenses at a health facility or at a business location, as defined in subdivision (e), only if the dispenser is in personal attendance at a certified place of business pursuant to Section 2564.93 at least 40 percent of the dispenser's regular working hours each week.

(e) “Business location” means the place at which any business employs more than 25 persons at any single business address, but shall not include a health facility, as defined in Section 1250 of the Health and Safety Code, or a certified place of business as specified in Section 2564.93.

(f) This section shall not affect the requirements regarding fitting and adjusting as set forth in Sections 2559.1 and 2560.