Which of the following is allowed to be advertised?

Practitioner's certifications can be advertised as they provide legitimate and verifiable credentials that inform the public about the professional qualifications and expertise of the optometrist. This practice aligns with the transparency and ethical standards expected in the field of optometry, allowing potential patients to make informed choices based on verified credentials.

Advertising proprietary treatment methods may lead to potential legal issues, particularly if such methods are not substantiated or recognized by the optometry standards in California. Unverified patient testimonials pose ethical concerns, as they may mislead prospective patients about the effectiveness of treatments. Exaggerated service claims can misrepresent what a practitioner can actually deliver, which goes against the foundational principle of honesty in advertising within healthcare. Therefore, promoting a practitioner's certifications is not only permissible but encouraged, provided they are current and verifiable.