Final answer:
In a cardiovascular examination, the observed sign in the eyes related to heart health is jugular venous distention, indicating potential issues with right-sided heart function.
Step-by-step explanation:
The signs that are inspected for in the eyes during a cardiovascular examination predominantly involve observations related to jugular venous distention (Option 4). This condition is associated with increased pressure in the jugular veins, which can indicate issues with right-sided heart function. While other options, such as pupillary reflex (Option 1) or visual fields (Option 3), are also relevant in medical examinations, they do not specifically relate to cardiovascular health. Kayser-Fleischer rings (Option 2) may be indicative of Wilson's disease, which involves copper metabolism but is not directly related to cardiovascular examination.