title: Anterior ischaemic optic neuropathy in a patient with optic disc drusen.
abstract: BACKGROUND
  Although visual field defects are well-known complications of optic disc drusen, reduction in visual acuity with this condition is rare.
  
  
  RESULTS
  We report on a 68-year-old male with bilateral optic disc drusen who presented with monocular loss of vision in the right eye associated with an inferior altitudinal visual field defect and signs consistent with acute anterior ischaemic optic neuropathy, confirmed on fluorescein angiography. He also had a left inferior nasal step, but no evidence of glaucomatous cupping. The disc drusen were documented clinically and on B scan ultrasound and computed tomography.
  
  
  CONCLUSIONS
  The diagnosis of acute anterior ischaemic optic neuropathy should be considered in patients with optic disc drusen who present with reduced visual acuity, particularly when the visual loss has been acute and non-progressive and is associated with altitudinal field loss and characteristic fluorescein angiography signs.
authors.affiliation: Department of Clinical Ophthalmology, University of Sydney, Westmead Hospital, NSW, Australia.
authors.forename: S C
authors.initials: SC
authors.lastname: Liew
authors.forename: P
authors.initials: P
authors.lastname: Mitchell
mesh_terms: D000368:Aged; D005451:Fluorescein Angiography; D005654:Fundus Oculi; D006801:Humans; D007511:Ischemia / Q000150:complications*; D008297:Male; D015594:Optic Disk Drusen / Q000175:diagnosis / Q000209:etiology*; D009900:Optic Nerve / Q000098:blood supply*; D009901:Optic Nerve Diseases / Q000175:diagnosis / Q000209:etiology* / Q000503:physiopathology; D014463:Ultrasonography; D014786:Vision Disorders / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology; D014792:Visual Acuity / Q000502:physiology; D058609:Visual Field Tests; D014794:Visual Fields / Q000502:physiology