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Optic disc measurements in full term infants.

Yogavijayan Kandasamy1, Roger Smith, Ian M R Wright

  • 1Department of Neonatology, The Townsville Hospital, 100 Angus Smith Drive, Douglas, Queensland 4814, Australia. yoga_kandasamy@health.qld.gov.au

The British Journal of Ophthalmology
|January 31, 2012
PubMed
Summary

Optic disc size in full term infants is not affected by sex or birth weight. This study measured optic disc dimensions in newborns, finding no significant differences between males and females or varying birth weights.

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Area of Science:

  • Ophthalmology
  • Neonatal Medicine
  • Pediatric Ophthalmology

Background:

  • Optic disc size is a critical parameter in ophthalmology.
  • Understanding normative values in neonates is essential for early detection of potential visual impairments.

Purpose of the Study:

  • To measure optic disc size in full term infants.
  • To investigate the influence of sex and birth weight on optic disc dimensions.

Main Methods:

  • Retinal images were acquired from a cohort of full term infants.
  • Optic disc size was quantified using image analysis software.
  • A systematic literature search was performed for comparative analysis.

Main Results:

  • Mean optic disc area was 1.26±0.23 mm², with a vertical diameter of 1.37±0.15 mm and horizontal diameter of 1.14±0.12 mm.

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  • The vertical optic disc diameter was significantly longer than the horizontal diameter (p<0.0001).
  • No significant differences in optic disc size were observed based on infant sex or birth weight.

    • Conclusions:

    • Optic disc size in term infants is independent of sex and birth weight.
    • These findings establish normative optic disc measurements for term neonates.