The pupil in stroke

Can J Ophthalmol. 1983 Aug;18(5):226-7.


Pupil sizes were assessed in 100 patients admitted to an intensive care stroke unit over a 1-year period to determine if differences existed and if anisocoria might help in diagnosis. From life-size photographs the pupil diameters were measured accurately, and clinical information compiled by the neurology staff was studied. Of the 19 patients with anisocoria 13 had a final diagnosis of stroke. This incidence of anisocoria, 16%, is similar to that in a normal population (20%). The side of the mydriasis was unrelated to the site of the lesions except when the stroke was due to a brainstem infarction; then ipsilateral Horner's syndrome occurred.

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Cerebrovascular Disorders / physiopathology*
  • Female
  • Horner Syndrome / physiopathology
  • Humans
  • Male
  • Middle Aged
  • Pupil*