O-7, r. 11 - Regulation respecting the medications that may be administered and prescribed for therapeutic purposes by an optometrist and respecting the eye care that may be provided by an optometrist

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3. An optometrist who administers or prescribes medications must refer the patient to a physician if there is no clear and positive improvement within 72 hours of the beginning of the treatment, in the following cases:
(1)  an infectious ulcer smaller than 1 mm outside of the pupillary zone;
(2)  the presence of epithelial dendrites without stromal injury with infiltrate or melting, and without inflammation in the anterior chamber;
(3)  corneal infiltrates smaller than 1 mm, with no epithelial defect; and
(4)  sectorial inflammation of the episclera, without ischemia or melting.
The optometrist must also refer the patient to a physician in those cases if the condition does not resolve within the accepted or anticipated amount of time, or at the latest, within 7 days of the beginning of the treatment.
An optometrist may not intervene in cases in which the conditions are more serious than those described in the first paragraph.
O.C. 1025-2003, s. 3.