#pupillary diameter
- Anisocoria — A medical condition characterized by an inequality in the size or diameter of the two pupils; anisocoria. This asymmetry can be a harmless physiological trait present in a small percentage of the population, or it may represent an alarming clinical sign of serious neurological disorders, head trauma, cerebral aneurysms, or Horner's syndrome, indicating a direct disruption of the sympathetic or parasympathetic pathways controlling pupillary dynamics.