Related Experiment Video
Updated: May 3, 2026
Stereoacuity Improvement using Random-Dot Video Games
Published on: January 14, 2020
Stereoacuity of preschool children with and without vision disorders
Elise B Ciner1, Gui-Shuang Ying, Marjean Taylor Kulp
1*OD, FAAO †PhD ‡OD, MS, FAAO §MD, MSCE ∥PhD, OD, FAAO **MS The Pennsylvania College of Optometry at Salus University, Philadelphia, Pennsylvania (EBC); Scheie Eye Institute, Department of Ophthalmology, University of Pennsylvania, Philadelphia, Pennsylvania (GSY, MGM, JH); College of Optometry, The Ohio State University, Columbus, Ohio (MTK); The Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania (GEQ); School of Optometry, University of California, Berkeley, Berkeley, California (DOB); Northeastern State University, Tahlequah, Oklahoma (LAC); and the New England College of Optometry, Boston, Massachusetts (BM).
Insights
Preschool children with vision disorders have significantly poorer stereoacuity. The Stereo Smile II test is highly effective for assessing stereopsis in young children, with excellent testability across all ages.
Area of Science:
- Ophthalmology
- Pediatric Vision
Background:
- Stereoacuity is crucial for visual development in preschool children.
- Vision disorders can impact stereopsis, affecting visual function.
- Early detection of vision problems in preschoolers is essential.
Purpose of the Study:
- To assess the link between stereoacuity and vision disorders in preschool children.
- To determine stereoacuity levels and testability in children without vision disorders.
- To validate the Stereo Smile II test for preschool vision screening.
Main Methods:
- Evaluated stereoacuity using the Stereo Smile II test in 2898 preschoolers (aged 3-5).
- Classified children based on the presence, type, and severity of vision disorders (amblyopia, strabismus, refractive error, reduced visual acuity).
- Compared stereoacuity between children with and without vision disorders using statistical tests.
Main Results:
- Children with vision disorders had significantly worse stereoacuity (120 vs. 60 seconds of arc).
- More severe vision disorders correlated with poorer stereoacuity (480 vs. 120 seconds of arc).
- Testability of the Stereo Smile II was 99.6% overall, increasing with age; 88% achieved the best stereoacuity levels.
Conclusions:
- Vision disorders in preschoolers are associated with significantly reduced stereoacuity.
- The Stereo Smile II test demonstrates excellent testability and validity for assessing stereopsis in this age group.
- Early identification and management of vision disorders can potentially improve stereoscopic vision.
Purpose:
To evaluate associations between stereoacuity and presence, type, and severity of vision disorders in Head Start preschool children and determine testability and levels of stereoacuity by age in children without vision disorders.
Methods:
Stereoacuity of children aged 3 to 5 years (n = 2898) participating in the Vision in Preschoolers (VIP) Study was evaluated using the Stereo Smile II test during a comprehensive vision examination. This test uses a two-alternative forced-choice paradigm with four stereoacuity levels (480 to 60 seconds of arc). Children were classified by the presence (n = 871) or absence (n = 2027) of VIP Study-targeted vision disorders (amblyopia, strabismus, significant refractive error, or unexplained reduced visual acuity), including type and severity. Median stereoacuity between groups and among severity levels of vision disorders was compared using Wilcoxon rank sum and Kruskal-Wallis tests. Testability and stereoacuity levels were determined for children without VIP Study-targeted disorders overall and by age.
Results:
Children with VIP Study-targeted vision disorders had significantly worse median stereoacuity than that of children without vision disorders (120 vs. 60 seconds of arc, p < 0.001). Children with the most severe vision disorders had worse stereoacuity than that of children with milder disorders (median 480 vs. 120 seconds of arc, p < 0.001). Among children without vision disorders, testability was 99.6% overall, increasing with age to 100% for 5-year-olds (p = 0.002). Most of the children without vision disorders (88%) had stereoacuity at the two best disparities (60 or 120 seconds of arc); the percentage increasing with age (82% for 3-, 89% for 4-, and 92% for 5-year-olds; p < 0.001).
Conclusions:
The presence of any VIP Study-targeted vision disorder was associated with significantly worse stereoacuity in preschool children. Severe vision disorders were more likely associated with poorer stereopsis than milder or no vision disorders. Testability was excellent at all ages. These results support the validity of the Stereo Smile II for assessing random-dot stereoacuity in preschool children.
More Related Videos
06:19Comparison of Three Clinical Stereoscopic Methods for Measuring Binocular Visual Function During Amblyopic Treatment in Unilateral Amblyopia
Published on: September 27, 2024
05:10Author Spotlight: An Automated Method for Assessing Visual Acuity in Infants and Toddlers Using an Eye-Tracking System
Published on: March 17, 2023
Related Concept Videos
01:12Visual Agnosia
01:25Learning Disabilities
Dyslexia
Dyslexia is a...