title: Non-arteritic anterior ischemic optic neuropathy secondary to acute primary-angle closure.
abstract: OBJECTIVE
  To describe a case of non-arteritic ischemic optic neuropathy (NAION) secondary to acute primary-angle closure (APAC).
  
  
  METHODS
  Case report.
  
  
  RESULTS
  A 50-year-old woman with painful visual loss in the right eye was found to be in APAC with a right afferent pupillary defect. Laser peripheral iridotomy relieved pain but did not improve vision. Diffuse optic disc edema in the right eye and a small cup-to-disc ratio in the left eye were evident. Magnetic resonance imaging was normal. The patient was diagnosed with non-arteritic ischemic optic neuropathy (NAION) secondary to APAC, a rare clinical entity which can result in markedly decreased visual acuity.
  
  
  CONCLUSIONS
  NAION secondary to APAC is a rare clinical entity that can result in severe vision loss.
authors.affiliation: Bascom Palmer Eye Institute, University of Miami, Miami, FL, USA.
authors.forename: Ajay E
authors.initials: AE
authors.lastname: Kuriyan
authors.forename: Byron L
authors.initials: BL
authors.lastname: Lam
keywords: NAION; acute angle closure glaucoma; optic nerve; perfusion pressure