title: Acute Primary Angle Closure in the Fellow Eye as a Complication of Facedown Position After Vitrectomy Surgery.
abstract: OBJECTIVE
  To report a case of acute primary angle closure that developed in the fellow eye rapidly after facedown position after vitrectomy surgery.
  
  
  METHODS
  A 66-year-old female developed acute primary angle closure in the fellow eye approximately 1.5 hours after facedown position after vitrectomy surgery for macular hole.
  
  
  RESULTS
  The intraocular pressure was controlled after treatment that included halting the facedown position, intravenous mannitol injection, and topical pilocarpine instillation. Facedown position was continued after laser peripheral iridotomy was performed. The intraocular pressure was controlled within normal range even after pilocarpine was withdrawn.
  
  
  CONCLUSIONS
  Although rare, the potential risk of acute-angle closure should be explicitly explained to patients being considered for facedown position after vitrectomy. Prophylactic intervention, such as laser peripheral iridotomy, could be considered for anatomically predisposed eyes.
authors.affiliation: *The Eye Hospital, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China †Ophthalmology Department, University of the West Indies, St Augustine, Trinidad and Tobago.
authors.forename: Zhong
authors.initials: Z
authors.lastname: Lin
authors.forename: Ronghan
authors.initials: R
authors.lastname: Wu
authors.forename: Nived
authors.initials: N
authors.lastname: Moonasar
authors.forename: Yehui
authors.initials: Y
authors.lastname: Zhou
mesh_terms: D000208:Acute Disease; D000287:Administration, Topical; D000368:Aged; D005260:Female; D015812:Glaucoma, Angle-Closure / Q000209:etiology* / Q000503:physiopathology / Q000628:therapy; D018475:Head-Down Tilt / Q000009:adverse effects*; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology*; D007498:Iris / Q000601:surgery*; D053685:Laser Therapy / Q000379:methods*; D008916:Miotics / Q000008:administration & dosage; D010862:Pilocarpine / Q000008:administration & dosage*; D012167:Retinal Perforations / Q000601:surgery; D014821:Vitrectomy / Q000009:adverse effects*
chemical_list: D008916:Miotics; D010862:Pilocarpine