title: Correlation of previous acute angle-closure attack with extent of synechial angle closure in chronic primary angle-closure glaucoma patients.
abstract: OBJECTIVE
  To document any correlation between previous acute angle-closure attack and the extent of synechial angle closure in chronic primary angle-closure glaucoma (PACG) patients.
  
  
  METHODS
  Consecutive cases of chronic PACG with patent peripheral iridotomy had gonioscopy performed. The extents of synechial angle closure of those chronic PACG eyes with previous documented acute angle-closure attack were compared to those eyes without such a history.
  
  
  RESULTS
  A total of 102 chronic PACG eyes of 102 patients were recruited. Twenty-seven eyes (26.5%) had a previous documented acute angle closure, while 75 eyes (73.5%) did not. The mean extent of synechial angle closure +/-1 SD was 307+/-68 degrees (range, 150-360 degrees) in those chronic PACG eyes with a history of previous acute angle closure, compared to 266+/-89 degrees (range, 90-360 degrees) in those chronic PACG eyes without such a history (P=0.03, Student's t-test). There were no statistically significant differences between the two groups in age, LogMAR visual acuity, intraocular pressure (IOP), number of glaucoma eye drops, vertical cup-to-disk ratio, mean deviation or pattern SD in Humphrey automated perimetry, and anterior chamber depth (P>0.05).
  
  
  CONCLUSIONS
  Previous acute angle-closure attack correlated with more extensive synechial angle closure in chronic PACG patients in this study.
authors.affiliation: Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of China. clemtham@hkstar.com
authors.forename: C C Y
authors.initials: CC
authors.lastname: Tham
authors.forename: J S M
authors.initials: JS
authors.lastname: Lai
authors.forename: Y Y Y
authors.initials: YY
authors.lastname: Kwong
authors.forename: S W
authors.initials: SW
authors.lastname: Lam
authors.forename: J C H
authors.initials: JC
authors.lastname: Chan
authors.forename: T Y H
authors.initials: TY
authors.lastname: Chiu
authors.forename: D S C
authors.initials: DS
authors.lastname: Lam
mesh_terms: D000208:Acute Disease; D000368:Aged; D000369:Aged, 80 and over; D002908:Chronic Disease; D005260:Female; D015812:Glaucoma, Angle-Closure / Q000473:pathology* / Q000503:physiopathology; D006801:Humans; D007429:Intraocular Pressure; D008297:Male; D008875:Middle Aged; D009898:Optic Disk / Q000473:pathology; D014792:Visual Acuity