title: Investigating ocular dimensions in African Americans with long anterior zonules.
abstract: OBJECTIVE
  To investigate ocular dimensions in African Americans with the long anterior zonule (LAZ) trait.
  
  
  METHODS
  A total of 61 African American LAZ subjects and 61 age-matched, race-matched, and sex-matched controls were compared with respect to central corneal thickness, central corneal curvature, axial length (AL), and subjective refraction.
  
  
  RESULTS
  LAZ right eyes had a mean SR=+1.75±1.82 D and were 1.58 D (95% confidence interval, 0.83-2.31 D, P<0.0001) more hyperopic on average when compared with the control right eyes. LAZ right eyes also had an AL that was 0.69 mm (95% confidence interval, 0.34-1.04 mm, P<0.001) shorter on average than control right eyes. Similar results were found for left eyes. No differences were found with respect to central corneal curvature and central corneal thickness (P>0.05).
  
  
  CONCLUSIONS
  In this data set, LAZ eyes tended to be more hyperopic and had ALs that were shorter than control eyes, characteristics that are consistent with elevated risk for angle-closure glaucoma.
authors.affiliation: Illinois Eye Institute, Illinois College of Optometry, Chicago, IL 60616, USA. droberts@ico.edu
authors.forename: Daniel K
authors.initials: DK
authors.lastname: Roberts
authors.forename: Radha
authors.initials: R
authors.lastname: Ayyagari
authors.forename: Bridget
authors.initials: B
authors.lastname: McCarthy
authors.forename: Hui
authors.initials: H
authors.lastname: Xie
authors.forename: Faith
authors.initials: F
authors.lastname: Davis
authors.forename: Jacob T
authors.initials: JT
authors.lastname: Wilensky
mesh_terms: D001741:Black or African American; D000368:Aged; D000369:Aged, 80 and over; D058452:Axial Length, Eye / Q000473:pathology*; D003315:Cornea / Q000473:pathology; D005260:Female; D015812:Glaucoma, Angle-Closure / Q000175:diagnosis / Q000209:etiology / Q000235:genetics*; D006801:Humans; D006956:Hyperopia / Q000175:diagnosis / Q000209:etiology / Q000235:genetics*; D007908:Lens, Crystalline / Q000473:pathology*; D008022:Ligaments / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D010641:Phenotype; D012029:Refraction, Ocular / Q000502:physiology*