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Related Experiment Videos

The modified frisby stereotest

K J Saunders1, J M Woodhouse, C A Westall

  • 1Department of Optometry and Vision Science, UWCC, Cardiff, UK.

Journal of Pediatric Ophthalmology and Strabismus
|November 1, 1996
PubMed
Summary
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Modified Frisby stereotest successfully assesses stereoacuity in young children. Simple changes improved test success rates and distinguished between testable and untestable infants, aiding early visual function evaluation.

Area of Science:

  • Ophthalmology
  • Pediatric Vision
  • Stereopsis Assessment

Background:

  • The Frisby stereotest is a standard clinical tool for estimating stereoacuity.
  • Assessing stereopsis is crucial in toddlers due to challenges with other visual function tests.

Purpose of the Study:

  • To enhance the Frisby stereotest for improved usability in infants and young children.
  • To develop methods for discriminating between testable and untestable children during stereopsis assessment.

Main Methods:

  • Introduced a nonstereo practice plate to the Frisby stereotest.
  • Incorporated an auditory reward for correct target identification.
  • Tested 165 children aged 0.5 to 47 months.

Main Results:

Related Experiment Videos

  • Modified test enabled assessment in infants as young as 7 months.
  • Over 60% of children aged 12 months completed the test.
  • Distinguished between children unable to cooperate and those lacking stereopsis.

Conclusions:

  • Simple modifications significantly increase the ease of using the Frisby stereotest for infant and child stereoacuity assessment.
  • The enhanced test effectively differentiates children who cannot cooperate from those without stereopsis.