Final answer:
The medical assistant should offer verbal instructions and assistance when providing discharge instructions for a visually impaired patient.
Step-by-step explanation:
When providing discharge instructions for a visually impaired patient, the medical assistant should take the following action: Offer verbal instructions and assistance. This is because the patient may have difficulty reading printed materials or visual aids. By providing verbal instructions and offering assistance, the medical assistant can ensure that the patient understands the instructions and can ask any questions they may have.