Effective medical examination of VDT workers using a new testing method of ocular alignment

To investigate the relationship between asthenopia of VDT workers and the ocular alignment, we measured far and near alignment of 407 subjects (74 VDT workers with asthenopia, 137 VDT workers without asthenopia, and 196 non-VDT workers) using Total Vision tester (VT-500). There was no relationship b...

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Bibliographic Details
Published in:Journal of medical systems 1998-04, Vol.22 (2), p.63-68
Main Authors: Matsuoka, Y, Nakamura, Y, Kobatake, T
Format: Article
Language:English
Subjects:
Adaptation, Physiological
Adult
Asthenopia - diagnosis
Asthenopia - epidemiology
Computer Terminals
Convergence, Ocular - physiology
Diagnostic Techniques, Ophthalmological
Esotropia - diagnosis
Esotropia - epidemiology
Exotropia - diagnosis
Exotropia - epidemiology
Humans
Incidence
Studies
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Summary:To investigate the relationship between asthenopia of VDT workers and the ocular alignment, we measured far and near alignment of 407 subjects (74 VDT workers with asthenopia, 137 VDT workers without asthenopia, and 196 non-VDT workers) using Total Vision tester (VT-500). There was no relationship between the asthenopia and the records of far alignment test. On the other hand, the incidence of exophoria and convergence insufficiency type in near alignment test was significantly high in the group of VDT workers with asthenopia. From these results, we speculate that cases who have exophoria or show incomplete fusional response measured under the near testing distance (50 cm) tend to complain of asthenopia.
ISSN:0148-5598
1573-689X
DOI:10.1023/A:1022686917229