Anisocoria refers to what anatomical finding?

• A. Unequal or asymmetric pupils
• B. Equal pupils
• C. Pupil dilation in both eyes
• D. Pupils react equally to light

Answer: (A)

Unequal or asymmetric pupils. Anisocoria is the finding that the two pupils are different sizes. A small, persistent difference can be normal for some people, but when you assess it, you also check how each pupil responds to light. If the size difference stays but both pupils react normally to light, that is still anisocoria with intact reactivity. If the difference changes with lighting or one pupil fails to constrict appropriately, that suggests a dysfunction in the nerve pathways controlling the iris and may indicate a neurological issue. The other statements describe normal or bilateral changes (equal pupils, dilation in both eyes, or equal light reaction), not an asymmetric pupil finding.