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Clinical study examines the range of zero-associated phoria in asymptomatic individuals, highlighting independence from demographic factors.
The clinical concept of the range of zero‐associated phoria is developed, and normative data for this range are presented based on a clinical study of 201 asymptomatic patients. The relation of patient age, sex, and amount of near lens addition to this range is examined. The range at far is not related to patient age or sex. The range at near appears to be independent of patient age, sex, and the amount of near addition required by presbyopes.
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GODIO et al. (1981) studied this question.
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