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THE SIGNIFICANCE OF INADEQUATE CONVERGENCE
Author(s) -
Pickwell L. D.,
Hampshire R.
Publication year - 1981
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.1981.tb00143.x
Subject(s) - convergence (economics) , convergence insufficiency , jump , convergence tests , norm (philosophy) , medicine , computer science , rate of convergence , physics , economics , economic growth , channel (broadcasting) , quantum mechanics , political science , law , ophthalmology , computer network
Two methods for clinical assessment of convergence difficulties were considered in relation 10 the symptoms reported in a sample of 455 patients; 110 of these patients showed poor convergence by one or both methods. Poor convergence movements were found to be associated with dccompensated exophoria for near vision. No evidence was found to associate a near‐point of convergence greater than 10 cm with a high incidence of symptoms, and this appears to be a less appropriate clinical norm than the observation of a normal convergence movement from a distant to a near target (jump convergence). Abnormal convergence movements (poor jump convergence) occurred more frequently than a receding near‐point of convergence and were also more frequently associated with symptoms. It is concluded that observation of jump convergence is a simple, quick and valuable clinical procedure for the assessment of the adequacy of convergence in relation to the normal near working distance.