瞳孔的改变是临床上常見的一个重要的体徵,尤其是神經系統的疾病,往往依它的政变,而助于某种疾病的診断。如腦膜炎在早期因动眼神經受刺激,而有痙攣性的瞳孔縮小;在晚期如动眼神麻痹,則有痲痹性瞳孔放大。脊髓癆有阿久罗氏瞳孔出現,在藥物中毒上,如嗎啡中毒有痙攣性的瞳孔縮小,可卡因中毒有痙攣性的瞳孔开大等;因之临床医生在檢查患者时,都要 Changes in the pupil is a clinically important sign, especially the nervous system diseases, often according to its coup, but to help diagnose a disease. Such as meningitis in the early due to oculomotor irritation, and spastic pupil constricted; late in the case of oculomotor palsy, there is paralytic mydriasis. Spinal cord A long Roche pupil appears in drug poisoning, such as morphine poisoning spastic miliary shrinkage, cocaine poisoning spastic pupil open large; so clinicians in the examination of patients, have to