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Abstract
Near lateral heterophoria and the gradient AC/A ratio were measured in 67 children (34 male and 33 female) using both the Red Plate Test and the Free‐Space Near Phoria Card Test and the results were compared. Correlation between the two tests was 0.6128 for heterophoria measurements and 0.4385 for AC/A ratio measurements. Paired t‐test showed significant differences between the tests in both heterophoria (t = 5.01, p < 0.01) and AC/A ratio (t = ‐7.07, p < 0.01) measurements.