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Br J Ophthalmol 1997;81:460-464 doi:10.1136/bjo.81.6.460
  • Original Article

Ultrasound biomicroscopic measurement of anterior chamber angle in premature infants

  1. Hiroshi Kobayashia,b,
  2. Junichii Kiryub,
  3. Kaori Kobayashib,
  4. Takehisa Kondoc
  1. aDepartment of Ophthalmology, Amagasaki Hospital, Amagasaki, Japan, bDepartment of Ophthalmology and Visual Science, Graduate School of Medicine Kyoto University, Kyoto, Japan, cDepartment of Ophthalmology, Kobe City General Hospital, Kobe, Japan
  1. Hiroshi Kobayashi, Department of Ophthalmology, Amagasaki Hospital, 1-1-1 Higashi-daimotsu-cho, Amagasaki, 660, Japan.
  • Accepted 10 March 1997

Abstract

AIM 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 μm 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.

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