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  1. Frequency of convergence insufficiency in optometry clinic settings.

    Article - En anglais


    To estimate the frequency of convergence insufficiency (Cl) and its related characteristics among 8-to 12-year-old children randomly selected from 2 optometry clinic populations.


    Clinic records of 620 children were randomly selected and reviewed according to a standard protocol, using a systematic sampling method based on the total number of 8-to 12-year-old children seen over a 1-year period at 2 optometry clinics.

    Records were reviewed for demographic and clinical data.

    Data on Cl-related symptoms were obtained at one of the sites.

    Records that met the eligibility criteria of :

    • good visual acuity (20/30 or better in both eyes) ;

    • minimal refractive error (-0.50 to+1.00 D and<1.00 D of astigmatism in either eye, and ¾1.00 D of anisometropia) ;

    • and no strabismus were evaluated for Cl-related characteristics.

    Eligible children were classified according to the direction of their near heterophoria and the number of the following clinical signs present :

    • (1) exophoria at near =4 delta than at far ;

    • (2) insufficient fusional convergence [i.e., failing Sheard's criterion or minimum normative positive fusional vergence (PFV) of 12 delta base-out (BO) blur/15 delta BO break] ;

    • and (3) receded nearpoint of convergence (NPC) of =7.5 cm break or =10.5 cm recovery. (...)

    Mots-clés Pascal : Exophorie, Classification, Symptomatologie, Lecture, Distribution, Epidémiologie, New York, Etats Unis, Amérique du Nord, Amérique, Enfant, Homme, Oeil pathologie, Oculomotricité syndrome, Strabisme

    Mots-clés Pascal anglais : Exophoria, Classification, Symptomatology, Reading, Distribution, Epidemiology, New York, United States, North America, America, Child, Human, Eye disease, Oculomotor syndrome, Strabismus

    Logo du centre Notice produite par :
    Inist-CNRS - Institut de l'Information Scientifique et Technique

    Cote : 98-0154501

    Code Inist : 002B02M. Création : 21/07/1998.