What term refers to uneven pupil size?

The term that refers to uneven pupil size is anisocoria. This condition occurs when there is a significant difference in the diameter of the pupils. Anisocoria can be a benign condition or may indicate an underlying health issue, such as neurological disorders, trauma, or specific diseases that affect the eye or brain. It's important to evaluate anisocoria in the context of other clinical signs to determine its significance.

Other options mentioned do not relate to pupil size. Calculus generally refers to a type of stone that can form in the body, particularly in the urinary system. Aspiration is a medical term that describes the act of inhaling a foreign object or substance into the airways, often leading to complications like aspiration pneumonia. Heat stroke is a serious condition resulting from prolonged exposure to high temperatures, leading to body overheating and systemic failure. These terms are distinct and not directly connected to the condition of pupil size.