Lucio Flores-Payan, Diana Mercedes Hernández-Corona, Tonatiuh González-Heredia
Multidimensional analysis of health in Mexico: implementation of fuzzy sets
BMC public health
prior findings suggest poor readers tend poor binocular vision skills data binocular abilities children poor reading skills lacking aim characterize distance near horizontal heterophoria distance near horizontal fusional vergence ranges accommodative convergenceaccommodation aca ratio near point convergence stereopsis poorreading schoolage children without dyslexia selected nonclinical population conducted crosssectional study 87 poor readers 32 control children 813 years age grades three six recruited eleven elementary schools madrid spain best spectacle correction subject distance near horizontal heterophoria measurements obtained using von graefe technique distance near horizontal fusional vergence ranges obtained using risley rotary prisms aca ratio measured using gradient method near point convergence npc evaluated standard pushup technique using transilluminator stereoacuity tested randot stereotest mean distance basein break basein recovery values nearly 2 delta lower p 001 poor readers recorded control group however mean distance baseout vergences blur break recovery mean distance near horizontal heterophoria mean near horizontal fusional vergence ranges mean aca ratio mean near point convergence npc mean stereoacuity differ significantly poor readers controls study provides information binocular ability children poor reading skills without dyslexia findings suggest reduced distance basein break basein recovery distance fusional vergence ranges always assessed children complain reading difficulties