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Related Experiment Videos

Normal values for Octopus tendency oriented perimetry in children 7 through 13 years old.

Sandra M Brown1, Jay C Bradley, Matthias J Monhart

  • 1Department of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, Lubbock, Texas TX 79430, USA. sandra.brown@ttuhsc.edu

Graefe'S Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Fur Klinische Und Experimentelle Ophthalmologie
|April 19, 2005
PubMed
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This study established normal visual field values for children aged 7-13 using the Octopus 301 perimeter. Age-appropriate comparison values are crucial for accurate pediatric eye exams, accounting for learning and fatigue effects.

Area of Science:

  • Ophthalmology
  • Pediatric Optometry
  • Visual Field Testing

Background:

  • Establishing normative data for visual field testing in children is essential for detecting early signs of visual impairment.
  • Previous studies have lacked comprehensive age-specific data for pediatric populations using specific perimetric devices.

Purpose of the Study:

  • To determine age-dependent normative values for mean sensitivity, mean deviation, and loss variance in children aged 6-13 years.
  • To evaluate the suitability of the Octopus 301 perimeter with the Tendency Oriented Perimetry 32 (TOP-32) program for pediatric visual field assessment.

Main Methods:

  • Recruited healthy children aged 6-13 years with normal visual acuity and stereopsis.
  • Utilized the Octopus 301 perimeter and TOP-32 program, testing each eye twice per session.

Related Experiment Videos

  • Averaged results from four tests per subject for statistical analysis of mean sensitivity, mean deviation, and loss variance.

    • Main Results:

    • Data from 119 children aged 7-13 years were analyzed after excluding 6-year-olds due to high variability.
    • Average test duration was 2.9 minutes; average mean sensitivity was 28.7 dB.
    • No significant age-dependent slope was found for mean sensitivity (p=0.83); high false positive rates (mean 26%) were observed.

    Conclusions:

    • The programmed normal mean sensitivity value for 20-year-olds (29.0 dB) is appropriate for comparison in children aged 7-13 years.
    • Learning and fatigue effects are apparent during sequential testing.
    • High false positive rates are inherent in pediatric testing; overencouragement should be avoided.