What happens if the patient’s ocular condition changes after the prescription is written?

When a patient's ocular condition changes after a prescription has been written, it is necessary for the patient to undergo a new exam. This is essential because a change in the ocular condition can significantly affect the patient's vision and may require a different prescription to ensure optimal visual acuity and comfort. Optometrists are responsible for providing accurate and current prescriptions based on the patient's health status and vision needs. Therefore, if there's an observable change in their condition, a revised assessment is critical to determine the appropriate corrective lenses.

In terms of the other options, the validity of a prescription is contingent upon the stability of the patient's condition, and thus merely extending the prescription or modifying it without a new examination could lead to inadequate vision correction or even exacerbate existing ocular issues.