title: Relation of ocular trauma to cortical, nuclear, and posterior subcapsular cataracts: the Beaver Dam Eye Study.
abstract: BACKGROUND
  The consequences of minor ocular trauma in the general population are unclear. The relation of self reported ocular trauma to cortical, nuclear, and posterior subcapsular cataracts is described in a defined population.
  
  
  METHODS
  Population based, cross sectional study involving all people aged 43 to 86 years, living in Beaver Dam, Wisconsin (n=4926). Ocular trauma was ascertained by interview and cataract was graded from lens photographs. The relation of ocular trauma to cortical, nuclear, and posterior subcapsular cataracts was examined.
  
  
  RESULTS
  People with a history of ocular trauma were more likely to have cortical (odds ratio (OR): 1.5; 95% confidence interval (CI): 1.0 to 2.2) and posterior subcapsular (OR: 1.7; 95% CI: 1.0 to 3.1) cataracts, compared to people without a history of trauma. These associations were stronger for people with previous trauma caused by a blunt object (OR: 3.3; 95% CI: 1.6 to 6.9 for cortical cataract, and OR: 4.1; 95% CI: 1.5 to 10.8 for posterior subcapsular cataracts). However, in analyses comparing the frequencies of cataract between traumatised and non-traumatised eyes among people with unilateral ocular trauma, the ocular trauma association for cortical cataract was no longer present, although the association for posterior subcapsular cataract persisted (OR: 2.4; 95% CI: 0.8 to 7.8).
  
  
  CONCLUSIONS
  The data provide evidence of a possible association between self reported ocular trauma and posterior subcapsular cataract.
authors.affiliation: Department of Ophthalmology and Visual Sciences, University of Wisconsin, Madison, WI, USA. tienyinwong@yahoo.com
authors.forename: T Y
authors.initials: TY
authors.lastname: Wong
authors.forename: B E K
authors.initials: BE
authors.lastname: Klein
authors.forename: R
authors.initials: R
authors.lastname: Klein
authors.forename: S C
authors.initials: SC
authors.lastname: Tomany
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002386:Cataract / Q000209:etiology* / Q000473:pathology; D003430:Cross-Sectional Studies; D005131:Eye Injuries / Q000150:complications*; D005260:Female; D006801:Humans; D007903:Lens Capsule, Crystalline; D007904:Lens Cortex, Crystalline; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D012307:Risk Factors; D014922:Wisconsin; D014949:Wounds, Nonpenetrating / Q000150:complications