瞳どう孔こう反はん射しゃ

noun

pupillary reflex

A biological/medical term for the automatic constriction or dilation of the pupil in response to light or focus changes.

• 医い師しは瞳どう孔こう反はん射しゃを調しらべて、神しん経けい系けいの状じょう態たいを確かく認にんした。

  The doctor checked the pupillary reflex to assess the condition of the nervous system.