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Examination of the near triad in VDU operators

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      <subfield code="a">Examination of the near triad in VDU operators</subfield>
      <subfield code="c">Satoshi Ishikawa</subfield>
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      <subfield code="a">The aim of the present study was to investigate the effect of a sustained accomodative stimulus on the tonic level of accommodation, pupil and convergence, i.e., the near triad, in three different groups. Accommodation was measured with an objective infrared optometer, the pupil was measured by an infrared video pupilography, and convergence was measured from the contralateral eye by photoelectronic oculography</subfield>
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      <subfield code="t">Ergonomics</subfield>
      <subfield code="d">London and Washington</subfield>
      <subfield code="g">Vol. 33, nº 6, June 1990 ; p. 787-798</subfield>
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