Journal of American Association for Pediatric Ophthalmology and Strabismus
Major ArticleStereoacuity norms for school-age children using the Frisby stereotest
Section snippets
Subjects and Methods
This study received ethical approval from the University of Ulster Research Ethics Committee and adhered to the tenets of the Declaration of Helsinki. As part of a wider study of vision, participants were recruited from primary (elementary grades 1-6) and post primary (high school grades 7-11) schools from one region of the United Kingdom across four age groups; 6-7 years, 9-10 years, 12-13 years, and 15-16 years. The schools represented a cross section of academic ability and socioeconomic
Results
A total of 212 participants were recruited. Of these, 3 were absent from school during data collection and were not tested, and 4 were excluded on the basis of parent-reported medical or ocular history. The remaining 205 participants successfully completed the Frisby and TNO stereotests. Data were omitted for an additional 19 children due to an interocular visual acuity difference of ≥0.2logMAR and/or anisometropia ≥1.00 D and/or strabismus; 186 study subjects (103 males [55%]) were analyzed.
Discussion
Reference data for the Frisby stereotest for school age children with good visual acuity and binocular vision are limited. This study reports median Frisby stereoacuity scores for primary school participants of 20 arcsec (crossed disparities) and 25 arcsec (uncrossed disparities), with 95% of children achieving scores of at least 85 arcsec (crossed) and 170 arcsec (uncrossed). Post-primary school participants achieved median stereoacuity scores of 10 arcsec (crossed and uncrossed disparities),
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