title: Reduced trabecular meshwork height in juvenile primary open-angle glaucoma.
abstract: OBJECTIVE
  To compare trabecular meshwork height in a series of patients with juvenile primary open-angle glaucoma (JPOAG) with that in normal control patients.
  
  
  METHODS
  Ultrasound biomicroscopy and A-scan biometry were performed on 16 eyes with JPOAG and 24 normal eyes. A radial, perpendicular image in the horizontal temporal meridian detailing the line of Schwalbe, scleral spur, and angle anatomy was obtained for each eye by a single examiner. Trabecular meshwork height was defined as the distance from the scleral spur to the Schwalbe line.
  
  
  RESULTS
  Mean patient age (P = .85, t test), refractive error (P = .68), sex distribution (P = .26, Fisher exact test) and axial length (P = .39) were similar between the groups. Mean +/- SE trabecular meshwork heights were 0.36 +/- 0.03 mm (range, 0.19-0.53 mm) for JPOAG and 0.58 +/- 0.02 mm (range, 0.40-0.80 mm) for controls (P < .001). Eyes with greater axial length tended to have larger trabecular meshworks in both groups (P = .012, multivariate regression). A trabecular meshwork height-axial length ratio of 0.021 or less was associated with a significantly increased risk for JPOAG being present (odds ratio, 57; 95% confidence interval, 6.0-541).
  
  
  CONCLUSIONS
  The trabecular meshwork is smaller in eyes with JPOAG compared with that in normal eyes. This finding suggests a structural abnormality that may underlie the reduced outflow.
authors.affiliation: Department of Ophthalmology, New York Eye and Ear Infirmary, New York, USA.
authors.forename: Z
authors.initials: Z
authors.lastname: Stegman
authors.forename: J
authors.initials: J
authors.lastname: Sokol
authors.forename: J M
authors.initials: JM
authors.lastname: Liebmann
authors.forename: H
authors.initials: H
authors.lastname: Cohen
authors.forename: C
authors.initials: C
authors.lastname: Tello
authors.forename: R
authors.initials: R
authors.lastname: Ritch
mesh_terms: D000293:Adolescent; D000328:Adult; D000869:Anterior Eye Segment / Q000000981:diagnostic imaging; D002648:Child; D005260:Female; D005902:Glaucoma, Open-Angle / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology*; D006801:Humans; D008297:Male; D008853:Microscopy; D008875:Middle Aged; D014129:Trabecular Meshwork / Q000000981:diagnostic imaging / Q000473:pathology*; D014463:Ultrasonography