title: [Study on the dynamic examination of anterior chamber angle by ultrasound biomicroscopy].
abstract: OBJECTIVE
  To study the factors that influence ultrasound biomicroscopy(UBM) examination on anterior chamber angle, and explore a dynamic differentiating method.
  
  
  METHODS
  To compare the UBM morphologic characters of the anterior chamber angle of the high-risk chamber angle and adhered angle groups under different illumination.
  
  
  RESULTS
  Under routine working condition, some eyes of the high-risk-group (9/12) displayed bombing iris with extremely narrowly-opened angle; but 3/12 cases and the control group showed bombing iris and closed angle. Under bright circumstances, all angles of the high-risk group showed widely-opened, but the control group remained closed.
  
  
  CONCLUSIONS
  Different illumination influences the UBM examination of the anterior chamber angle significantly, we should differentiate the angle morphologic characters under different illumination if it seems to be closed. Factors that affect the UBM examination were also discussed.
authors.affiliation: Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, Guangzhou 510060, China.
authors.forename: W
authors.initials: W
authors.lastname: Huang
authors.forename: D
authors.initials: D
authors.lastname: Peng
authors.forename: X
authors.initials: X
authors.lastname: Chen
mesh_terms: D000867:Anterior Chamber / Q000033:anatomy & histology / Q000000981:diagnostic imaging* / Q000473:pathology*; D000886:Anthropometry; D015812:Glaucoma, Angle-Closure / Q000000981:diagnostic imaging* / Q000473:pathology; D006068:Gonioscopy / Q000379:methods; D006801:Humans; D033401:Microscopy, Acoustic / Q000379:methods