Pharmaceutical Agents, Diagnostic and Therapeutic Privileges, and Restrictions
What this domain tests
This domain tests the legal boundary of optometric drug authority: diagnostic agents, therapeutic agents, routes, formulary limits, documentation, and referral when the condition exceeds scope.
Core rules and concepts
- Louisiana optometrists may use diagnostic pharmaceutical agents and therapeutic pharmaceutical agents only as authorized by the Practice Act and Board rules. Authority is not a blanket medical license.
- Some agents or routes may be restricted, require additional certification, or be excluded. Know the current formulary and any category limits rather than assuming that a drug is permitted because it treats an eye condition.
- Prescribing requires a documented diagnosis, allergy and medication review, informed consent, dosing instructions, follow-up, and referral when needed.
- Controlled substances require separate federal and state registration where authorized; registration does not expand optometric scope.
- Co-management must respect scope: the optometrist may monitor an authorized condition but must refer orbital, intraocular, or surgical problems outside optometric authority.
Worked example
A patient has bacterial conjunctivitis without corneal involvement. A topical antibiotic may be within therapeutic authority if the agent is permitted and the diagnosis is documented. If the patient has orbital cellulitis, pain with eye movement, or marked vision loss, the optometrist must refer for medical or surgical management rather than merely changing drops. Reasoning: first confirm the drug and route are authorized, then confirm the condition is within scope.
Traps that cost marks
Assuming all topical drugs are permitted; prescribing for a condition outside scope because the drug is familiar; and omitting follow-up or referral documentation.