Which of the following symptoms is NOT associated with Acute Mountain Sickness (AMS)?

Acute Mountain Sickness (AMS) typically occurs at high altitudes where the air has lower oxygen levels. The symptoms of AMS commonly include nausea and vomiting, fatigue, and difficulty sleeping, as these physical indicators result from the body struggling to acclimatize to the reduced availability of oxygen.

Blurred vision, while it can occur in various contexts, is not a recognized symptom associated with AMS. When someone is experiencing AMS, they usually experience more direct symptoms related to the body's response to altitude, such as those involving headaches, dizziness, and gastrointestinal reactions. Therefore, blurred vision is considered unrelated to the classic symptoms of AMS, reinforcing why it is the correct answer in this context.