O-7, r. 5 - Code of ethics of optometrists

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27. Except for a just and reasonable cause, no optometrist may refuse or cease to act on behalf of a patient. The following causes, among others, are considered just and reasonable:
(1)  absence or loss of the patient’s trust;
(2)  the fact that the optometrist is in a conflict of interest or in a context such that his professional independence could be called into question;
(3)  incitement by the patient to perform illegal, unjust or fraudulent acts.
O.C. 643-91, s. 27.