Predictive value of Randot Preschool in detecting binocular vision problems, by age-group, taking “pass” as a score of 800 arcsec or lower.

N = number of children, TP = number of true positives (those who had a binocular vision problem and failed the stereotest), FP = number of false positives, TN = number of true negatives, FN = number of false negatives, PPV = positive predictive value, NPV = negative predictive value (see Fig 9).