title: Clinical study on Hypotony following blunt ocular trauma.
abstract: OBJECTIVE
  To evaluate the incidence and risk factors of hypotony in patients with blunt ocular trauma.
  
  
  METHODS
  The medical records of 145 patients with blunt ocular trauma were reviewed. Hypotony was defined as an average intraocular pressure (IOP) of 5mmHg or less for three times.
  
  
  RESULTS
  Among these 145 patients, hypotony was noted in 10 (6.9%) patients. The rate of hypotony in patients with ciliochoroidal detachment was 66.7% (2 out of 3 eyes), and 5.6% (8 out of 142 eyes) in patients without ciliochoroidal detachment, the difference was statistically significant (P=0.003). The rate of hypotony in patients with traumatic retinal detachment was 18.5% (5 out of 27 eyes), and 4.2% (5 out of 118 eyes) in patients without traumatic retinal detachment, the difference was statistically significant (P=0.026). The rate of hypotony in the patients with anterior proliferative vitreoretinopathy was 42.9% (3 out of 7 eyes) and 5.1% (7 out of 138 eyes) in the patients without anterior proliferative vitreoretinopathy, the difference was statistically significant (P=0.002).
  
  
  CONCLUSIONS
  Ocular hypotension is a complication of blunt ocular trauma. The risk factors include ciliochoroidal detachment, traumatic retinal detachment, and anterior proliferative vitreoretinopathy.
authors.affiliation: Department of Ophthalmology, the Second Xiangya Hospital of Central South University and Institution of Ophthalmic Center, Changsha 410011, Hunan Province, China.
authors.forename: Chun
authors.initials: C
authors.lastname: Ding
authors.forename: Jun
authors.initials: J
authors.lastname: Zeng
keywords: anterior proliferative vitreoretinopathy; blunt trauma; ciliochoroidal detachment; hypotony; traumatic retinal detachment