title: Pearls & oy-sters: oval pupil: two observations.
abstract: The presence of an oval pupil usually localizes the neurologic problem to the midbrain.
authors.affiliation: From the Department of Neurology, Division of Critical Care Neurology, Mayo Clinic, Rochester, MN.
authors.forename: Manoj K
authors.initials: MK
authors.lastname: Mittal
authors.forename: Alejandro A
authors.initials: AA
authors.lastname: Rabinstein
authors.forename: Eelco F M
authors.initials: EF
authors.lastname: Wijdicks
mesh_terms: D000368:Aged; D002545:Brain Ischemia / Q000150:complications* / Q000175:diagnosis; D002533:Cerebral Angiography; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D020300:Intracranial Hemorrhages / Q000150:complications* / Q000175:diagnosis; D008279:Magnetic Resonance Imaging; D008297:Male; D008636:Mesencephalon / Q000473:pathology*; D008875:Middle Aged; D011681:Pupil Disorders / Q000209:etiology* / Q000503:physiopathology; D020521:Stroke / Q000150:complications* / Q000175:diagnosis; D014057:Tomography, X-Ray Computed