Clinical characteristics of dyslexic and non-dyslexic children.

Clinical characteristics of all children tested. Median values for binocular vision (stereoacuity test, TNO measured in seconds of arc); near point of convergence (NPC measured in cm); heterophoria at far and near distance, measured in prism diopters; ortho = orthophoria; exo = exophoria; vergence fusional amplitudes (divergence and convergence) at far and near distance, measured in prism diopters. Asterisks indicate that the value is significantly different for the group of dyslexic children (p<0.01).