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Random dot stereoacuity of preschool children. ALSPAC "Children in Focus" Study Team
E Birch1, C Williams, J Hunter
1Retina Foundation of the Southwest, Dallas, TX 75231, USA.
Insights
A new book-format random dot stereopsis test accurately measures stereoacuity in preschool children. This visual acuity test offers a higher success rate than existing methods for young children.
Area of Science:
- Ophthalmology
- Pediatric Vision
- Visual Neuroscience
Background:
- Standard stereopsis tests are inaccurate for children under 5.
- Existing preschool vision tests offer limited, pass/fail data.
- A need exists for precise stereoacuity measurement in young children.
Purpose of the Study:
- Develop a book-format random dot stereopsis test for preschoolers.
- Create a quick and accurate method for assessing stereoacuity in children aged 3-5.
Main Methods:
- Evaluated 25 shapes with 43 three-year-olds, selecting 11 shapes for the final test.
- Administered the preschool random dot stereotest to over 1000 children in diverse settings.
- Compared results with standard stereoacuity tests and clinical examinations.
Main Results:
- The new test demonstrated high success rates across various settings.
- Sensitivity, specificity, and accuracy exceeded 0.90.
- Achieved excellent concordance with gold-standard clinical examinations.
Conclusions:
- Preschool random dot books provide accurate stereoacuity measurement in 3- to 5-year-olds.
- This new test shows a higher success rate than other methods in the preschool age group.
Purpose:
Commercially available book-format random dot stereopsis tests for children are quick and simple to use, but provide accurate measurement of stereoacuity only in children age 5 years or older. Alternative methods for preschool children provide only pass/fail information or require lengthy laboratory-based protocols. To address the need for a quick and accurate measure of random dot stereoacuity in the preschool age range, we developed a new book-format random dot stereoacuity test.
Methods And Results:
A total of 25 potential shapes for the new test were evaluated in a group of 43 healthy full-term children aged 3 years +/- 2 months. Eleven shapes that were identified successfully by more than 95% of the 3-year-olds were selected to be incorporated into the preschool stereotest. The preschool random dot stereotest books were administered to more than 1000 normal children and pediatric patients in multiple settings: a research laboratory (Retina Foundation SW), a population screening project (University of Bristol, UK), eye clinics (Children's Medical Center, Dallas, Tex), and a day care center (Federal University, São Paulo, Brazil). Randot, Lang 1, Frisby, or Titmus stereoacuity tests also were administered. Orthoptic or ophthalmic examinations were obtained for all children as a gold standard. Outcome measures were success rate and concordance with the clinical examination. Sensitivity, specificity, and accuracy exceeded 0.90 both in clinical and screening settings.
Conclusions:
The preschool random dot books had a higher success rate than other tests in the preschool age range and provided accurate measurement of stereoacuity in the 3- to 5-year-old age range.
