title: [Relationship between ocular axial length and central retinal vein occlusion].
abstract: OBJECTIVE
  To evaluate the relationship between ocular axial length and central retinal vein occlusion (CRVO).
  
  
  METHODS
  A-scan ultrasonography was used to measure the ocular axial length in 30 patients with CRVO (the CRVO group) and 30 normal persons and 90 patients with cataract matched in sex and age with the former group (the control group).
  
  
  RESULTS
  The mean axial length of the affected eyes in CRVO group was (22.54 +/- 0.74) mm, and that of the follow eyes, (22.95 +/- 0.92) mm. The mean axial length of the affected and the fellow eyes in CRVO group did not differ statistically (t = 2.94, P > 0.05). The mean axial length in the right eyes of the control group was (23.45 +/- 0.66) mm and that of the left eyes, (23.56 +/- 0.95) mm, the difference being not significant statistically (t = 1.96, P > 0.05). The difference in axial length between the eyes with CRVO and the eyes in the control group was statistically significant (t = 4.09, P < 0.01).
  
  
  CONCLUSIONS
  Short axial length is one of the risk factor for central retinal vein occlusion.
authors.affiliation: Department of Ophthalmology, China-Japan Friendship Hospital, Beijing 100029, China.
authors.forename: A
authors.initials: A
authors.lastname: Shi
authors.forename: S
authors.initials: S
authors.lastname: Chen
mesh_terms: D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D002386:Cataract / Q000000981:diagnostic imaging; D005123:Eye / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012170:Retinal Vein Occlusion / Q000000981:diagnostic imaging*; D012307:Risk Factors; D014463:Ultrasonography