A nurse is reinforcing teaching with the parent of a preschooler who has amblyopia. Which of the following instructions should the nurse include in the teaching?

Rationale: A) Instilling antibiotic eye solution is not a treatment for amblyopia unless there is an associated infection. B) Irrigating both eyes with sterile water is not a treatment for amblyopia. C) Patching the unaffected eye helps encourage the use and strengthening of the affected eye, a common treatment approach for amblyopia. D) Applying a warm pack to the affected eye is not a treatment for amblyopia and may not be safe for the eyes.