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KMID : 1159320080100010071
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Korean Journal of Vision Science
2008 Volume.10 No. 1 p.71 ~ p.77
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The Study on Relation between Fusional Reserve and Asthenopia of Lateral Phoria in Myopia
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Yoon Kyoung-Han
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Abstract
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Purpose: The aim of this study was to evaluate the relation between asthenopia of near lateral phoria and fusional reserve and also to provide fundamental clinical data.
Methods: A total of 80 subjects aged between 18 and 34 years old, who had no strabismus, an eye trouble or whole body disease, were examined naked visual acuity, corrected visual acuity, corrected diopter, phoria, fusional reserve tests.
Results: According to interview results was that in near works, exophoria and esophoria with asthenopia was 58.5%, 61.5%, and 51.5% respectively. The subjects who have exophoria of 0-6△ in the range of normal state was 18.5%. The subjects who have exophoria of 7△ over in the range of abnormal state was 81.5%. The fusional reserve was in inverse proportion to phoria. The fusional reserve was twice over of phoria were 27.5%, and twice under were 72.5%. The asthenopia complain persons were 33.9% with the twice over fusional reserve of phoria. The asthenopia no complain persons were 66.1% with the twice under fusional reserve of phoria.
Conslusion: our research has shown conclusively that there is a link between asthenopia of lateral phoria and fusional reserve and we also find that fusional reserve must be examined when we prescribe for a patient who has phoria.
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KEYWORD
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Asthenopia, Exophoria, Fusional Reserve
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