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SITA visual field testing in children.

S P Donahue1, A Porter

  • 1Department of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-8808, USA. sean.donahue@mcmail.vanderbilt.edu

Journal of AAPOS : the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
|April 17, 2001
PubMed
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The Swedish Interactive Thresholding Algorithm (SITA) significantly reduces visual field test time in children by over 50% compared to full threshold testing. This method maintains interpretability and shows lower variability, making it effective for detecting pediatric visual field defects.

Area of Science:

  • Ophthalmology
  • Visual field testing
  • Pediatric neurology

Background:

  • The Swedish Interactive Thresholding Algorithm (SITA) is a Humphrey perimeter testing strategy known to shorten test times in adults.
  • Its efficacy in pediatric populations, particularly for detecting visual field defects, remains uninvestigated.

Purpose of the Study:

  • To evaluate the usefulness of the standard SITA 24-2 visual field testing strategy in children.
  • To compare SITA with full threshold testing (FTT) in pediatric patients with optic neuropathies.

Main Methods:

  • Evaluated 92 SITA 24-2 visual fields and 49 FTT 24-2 visual fields in children with various optic neuropathies.
  • Compared outcome measures including foveal threshold, mean defect, pattern standard deviation, error rates, and test duration.

Related Experiment Videos

  • Included a subset of 5 children who underwent both SITA and FTT.

    • Main Results:

    • SITA reduced test time by over 50% compared to FTT (6.6 +/- 1.6 minutes vs. 12.6 +/- 3.0 minutes, P <.00001).
    • SITA demonstrated lower pattern standard deviation in subjects with normal fields, indicating reduced intratest variability.
    • No significant differences were found in other outcome measures; subjective analysis showed similar gray-scale field interpretations.

    Conclusions:

    • SITA significantly shortens visual field test time in children without compromising interpretability.
    • SITA's lower intratest variability suggests it is advantageous for detecting and monitoring visual field defects.
    • Consistent use of the same visual field testing strategy is recommended for accurate defect tracking.