Which of the following most qualifies as a chief complaint?

The chief complaint refers to the primary reason a patient seeks medical attention, typically expressed in their own words. In this context, "eye fatigue" aligns with this definition because it describes a specific symptom or concern that the patient is experiencing, which prompted them to seek help.

"Current medications" does not qualify as a chief complaint since it refers to what the patient is taking rather than what is bothering them. "Munson's Sign" and "exophoria" are clinical findings or conditions related to medical evaluations rather than expressions of patient distress or discomfort. Therefore, only "eye fatigue" encapsulates a patient's direct concern, making it the most appropriate choice for the chief complaint in this scenario.