title: Ultrasound biomicroscopic measurement of anterior chamber angle in premature infants.
abstract: OBJECTIVE
  To establish normative values for the anterior segment in premature infants in relation to postconceptional age and birth weight.
  
  
  METHODS
  Anterior segments were measured in 39 premature infants, 25 to 39 weeks' gestational age by use of ultrasound biomicroscopy and a muscle hook with topical anaesthesia.
  
  
  RESULTS
  Anterior chamber depth, trabecular-iris angle, angle opening (trabecular-iris) distances at 250 and 500 microns from the scleral spur, and the thickness of the thickest part of the iris showed linear increases in relation to postconceptional age and birth weight.
  
  
  CONCLUSIONS
  Ultrasound biomicroscopy is a powerful tool for obtaining precise images and measurement of the anterior segment in preterm neonates. Normative values were established for anterior segment dimensions in relation to postconceptional age and birth weight.
authors.affiliation: Department of Ophthalmology, Amagasaki Hospital, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Kobayashi
authors.forename: J
authors.initials: J
authors.lastname: Kiryu
authors.forename: K
authors.initials: K
authors.lastname: Kobayashi
authors.forename: T
authors.initials: T
authors.lastname: Kondo
mesh_terms: D000367:Age Factors; D000867:Anterior Chamber / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D001699:Biometry; D001724:Birth Weight; D003430:Cross-Sectional Studies; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D012044:Regression Analysis; D014463:Ultrasonography