anisocoria
Pronunciation: an-eye-so-KOR-ee-ah
Unequal pupil sizes, which may be physiological or indicate underlying neurological or ocular pathology.
Full Definition
Anisocoria refers to a difference in pupil diameter between the two eyes, with the disparity typically measured in millimeters under standardized lighting conditions. While mild anisocoria (≤1mm) can be physiological and benign, significant differences may indicate serious conditions such as Horner's syndrome, third nerve palsy, or pharmacological pupil dilation. In the perioperative setting, anisocoria can result from surgical trauma, medications, or complications affecting pupillary function. Proper documentation includes pupil sizes in both light and dark conditions to characterize the underlying mechanism.
Usage
Usage note: Always measure and document pupil sizes in standardized lighting when anisocoria is noted.
In Context
- "Postoperative anisocoria was noted with the surgical eye showing a 2mm larger pupil diameter." — Recovery room assessment
- "The patient's preexisting anisocoria was documented before administering mydriatic drops." — Preoperative examination