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Related Experiment Videos

Frequency doubling technology perimetry in normal children.

Laurel M Quinn1, Stuart K Gardiner, David T Wheeler

  • 1Casey Eye Institute, Oregon Health & Science University, Portland, Oregon 97239-4197, USA.

American Journal of Ophthalmology
|October 19, 2006
PubMed
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This study shows that visual field testing using frequency doubling technology (FDT) perimetry requires revised normal sensitivity parameters for children under 15. Current adult standards are not suitable for younger pediatric populations.

Area of Science:

  • Ophthalmology
  • Pediatric Optometry
  • Visual Field Testing

Background:

  • Frequency Doubling Technology (FDT) perimetry is a common method for visual field testing.
  • Established normative databases for FDT perimetry are primarily based on adult populations.
  • Pediatric visual field characteristics may differ significantly from adults, necessitating age-specific normative data.

Purpose of the Study:

  • To establish normative visual field thresholds using FDT perimetry in a pediatric population.
  • To quantify testing times and reliability of FDT perimetry in children.
  • To determine if current adult FDT perimetry normative values need revision for pediatric use.

Main Methods:

  • A prospective cross-sectional study involving 94 children aged 5-17 years.

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  • Exclusion of children with potential visual field abnormalities or testing difficulties.
  • Threshold FDT visual field testing was performed on each eye, with results compared to adult norms and validated at a second center with 72 additional children.

    • Main Results:

    • Children over 14 years had mean deviation values within adult normal limits.
    • For children younger than 15, mean deviations decreased with age, following the equation: -11.43 +/- 0.82 dB x age.
    • A significant correlation (P < 10(-5)) was found between age and mean deviation in younger children.

    Conclusions:

    • A normative model for pediatric FDT visual field testing has been established.
    • Evidence suggests that current adult normative parameters for visual sensitivity require revision for children under 15 years.
    • Age-specific normative data is crucial for accurate interpretation of FDT perimetry results in pediatric populations.