An Esophoric Shift Associated with Sustained Fixation
作者:
MARTIN BIRNBAUM,
期刊:
American Journal of Optometry and Physiological Optics
(OVID Available online 1985)
卷期:
Volume 62,
issue 11
页码: 732-735
ISSN:0093-7002
年代: 1985
出版商: OVID
关键词: accomodation;near phoria;esophoric shift;sustaind fixation;vergence;prism adaptation
数据来源: OVID
摘要:
Some subjects show a progressive increase in their near phoria, in the direction of more esophoria, when the test is repeated. Eighteen of 100 subjects showed 5Δor more esophoric shift. This result suggests that similar phoria changes may occur during prolonged intensive nearwork. The results reported are not the same as prism adaptation because the esophoric shift was found with dissociated targets. Autonomic arousal with sympathetic activation associated with heightened attention and concentration is proposed as the mechanism.
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