title: Location and extent of subconjunctival hemorrhage.
abstract: OBJECTIVE
  Subconjunctival hemorrhage (SCH) is a relatively frequent disease; however, there have been no reports about its location and extent. We examined its location and extent.
  
  
  METHODS
  A total of 151 patients with SCH aged 2-94 years were studied. The conjunctiva was divided into 8 equal areas. The age, gender, medical history, ocular history and site of hemorrhage were determined for all subjects.
  
  
  RESULTS
  The number of areas involved by SCH showed an age-related increase. Traumatic SCH had a smaller extent compared with SCH related to hypertension, diabetes and hyperlipidemia, or idiopathic SCH. Overall, SCH was significantly more common in the inferior areas than the superior areas (55.3% vs. 25.0%, p < 0.000001). In patients with SCH secondary to trauma or diabetes, however, the temporal areas were affected more often than the nasal areas (61.5% vs. 30.8% and 73.3% vs. 20.0%, respectively).
  
  
  CONCLUSIONS
  SCH showed an age-related increase in extent and was predominant in the inferior areas. However, traumatic SCH was usually detected as localized hemorrhage in the temporal areas.
authors.affiliation: Department of Ophthalmology, University of Tokyo Graduate School of Medicine, Tokyo, Japan. mimurat-tky@umin.ac.jp
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Mimura
authors.forename: Satoru
authors.initials: S
authors.lastname: Yamagami
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Usui
authors.forename: Hideharu
authors.initials: H
authors.lastname: Funatsu
authors.forename: Hidetaka
authors.initials: H
authors.lastname: Noma
authors.forename: Norihiko
authors.initials: N
authors.lastname: Honda
authors.forename: Shima
authors.initials: S
authors.lastname: Fukuoka
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Hotta
authors.forename: Shiro
authors.initials: S
authors.lastname: Amano
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000473:pathology; D002648:Child; D002675:Child, Preschool; D003229:Conjunctival Diseases / Q000453:epidemiology* / Q000473:pathology; D005130:Eye Hemorrhage / Q000453:epidemiology* / Q000473:pathology; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D012307:Risk Factors