title: Afferent pupillary defect associated with optic nerve head drusen.
abstract: BACKGROUND
  Optic nerve head drusen (ONHD) are a relatively uncommon finding with an estimated prevalence of anywhere from 0.3% to 2%. Reports of relative afferent pupillary defects (RAPDs) associated with ONHD are scarce.
  
  
  METHODS
  A patient with an RAPD was found to have ONHD as the only apparent etiology of the RAPD. The various diagnostic tests relevant to the case, the differential diagnosis, and the pathological features of ONHD are discussed.
  
  
  CONCLUSIONS
  It is important for the clinician to consider an RAPD as a possible pathological feature of ONHD--especially with an asymmetric presentation.
authors.affiliation: Department of Veteran Affairs, James H. Quillen VA Medical Center, Eye Clinic, Tennessee, USA.
authors.forename: H
authors.initials: H
authors.lastname: Bohlman
mesh_terms: D000368:Aged; D002114:Calcinosis / Q000150:complications / Q000175:diagnosis; D003937:Diagnosis, Differential; D005451:Fluorescein Angiography; D005654:Fundus Oculi; D006801:Humans; D007498:Iris / Q000000981:diagnostic imaging; D008297:Male; D009801:Oculomotor Muscles / Q000294:innervation / Q000503:physiopathology; D015594:Optic Disk Drusen / Q000150:complications* / Q000175:diagnosis; D009916:Orbital Diseases / Q000150:complications / Q000175:diagnosis; D011681:Pupil Disorders / Q000175:diagnosis / Q000209:etiology*; D012160:Retina / Q000000981:diagnostic imaging / Q000473:pathology; D014463:Ultrasonography; D058609:Visual Field Tests; D014794:Visual Fields