Correlations of sighting-eye dominance tests and comparison of combined scores in classroom, clinic, and ophthalmological populations.

Contingency coefficients for near- and far-point binocular and monocular sighting tests determined from data of 240 classroom children in Grades 4, 8, and 12 were significant. Also significant differences were noted for distributions of sighting tests combined two at a time (correlated) when compared with distributions of responses on a single test. Comparison of combined test distributions for classroom and clinic populations yielded significant differences in near-point sighting and between near- and far-point tests. Comparison with the ophthalmological data of Fink confirmed the validity of the findings. All simple and combined score distributions deviated from normalcy. Near-point binocular sighting exerts a strong influence on combined score distributions because more mixed-eyedness is is indicated by that test.