Which of the following most qualifies as a chief complaint?

In a clinical context, the chief complaint refers to the primary symptom or concern that prompts a patient to seek medical attention. It is typically a subjective statement provided by the patient that captures their most pressing health issue at the time of the visit.

Eye fatigue specifically qualifies as a chief complaint because it reflects the patient's personal experience with discomfort or functional impairment regarding their vision. This subjective feeling can be a significant factor in their quality of life and may lead them to seek ways to alleviate the problem, making it essential for a healthcare provider to address it.

In contrast, the other options represent either specific signs or elements that do not directly encapsulate the patient's primary concern. Current medications, although relevant to medical history, do not express a symptom that needs immediate attention. Munson's sign is an observable sign related to a specific condition but does not reflect what the patient feels or their reason for visiting a healthcare provider. Exophoria is a term describing a type of eye misalignment, which, while clinically important, does not communicate the patient's subjective discomfort or concern in the same way that eye fatigue does. Thus, eye fatigue stands out as the most appropriate choice for the chief complaint.