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Author Spotlight: An Automated Method for Assessing Visual Acuity in Infants and Toddlers Using an Eye-Tracking System
Published on: March 17, 2023
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Induced Tropia Test and Visual Acuity Testing in Nonverbal Children
Kaajal D Nanda1, Bianca Blaha1, Whitney T Churchfield1
1a Eye Center, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania.
Journal of Binocular Vision and Ocular Motility
|October 18, 2018
Summary
The induced tropia test (ITT) is more attainable for assessing vision in nonverbal children than the Cardiff Acuity Card (CAC) test. Performing the CAC test with both eyes open before ITT may yield more visual information.
Area of Science:
- Pediatric Ophthalmology
- Vision Science
Background:
- Assessing visual acuity in nonverbal children presents significant challenges.
- Monocular vision deficits require accurate detection for timely intervention.
Purpose of the Study:
- To compare the effectiveness of the Cardiff Acuity Card (CAC) test and the induced tropia test (ITT) in detecting monocular vision deficits in nonverbal children.
- To determine the optimal sequence for administering these tests to maximize information gathering.
Main Methods:
- Retrospective review of 34 nonverbal children (12-48 months) attending a pediatric ophthalmology clinic.
- Comparison of visual acuity data obtained from CAC and ITT.
- Analysis of fixation preference and visual acuity discrepancies.
Main Results:
- Induced tropia testing (ITT) was more attainable than monocular CAC testing.
- CAC test sensitivity was 40% and specificity was 63% when compared to ITT.
- A suggested testing order: CAC (both eyes open) followed by ITT, then monocular CAC.
Conclusions:
- The ITT is a more achievable method for gathering visual information in nonverbal children.
- Prioritizing ITT or a modified CAC approach can improve data acquisition and maintain child cooperation.
- A combined approach may offer a more complete assessment of visual behavior.
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