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Related Experiment Videos

Symptoms in VDU operators.

S J Dain1, A K McCarthy, T Chan-Ling

  • 1School of Optometry, University of New South Wales, Kensington, Australia.

American Journal of Optometry and Physiological Optics
|March 1, 1988
PubMed
Summary
This summary is machine-generated.

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Visual and ocular characteristics of visual display unit (VDU) operators were studied for links to eye strain. Some differences were found, but no clear visual standards for VDU use could be established.

Area of Science:

  • Ophthalmology
  • Occupational Health
  • Human Factors Engineering

Background:

  • Subjective visual fatigue in visual display unit (VDU) operators is a common complaint.
  • The specific visual and ocular characteristics contributing to this fatigue have not been extensively investigated.

Purpose of the Study:

  • To investigate the relationship between visual and ocular characteristics and subjective visual fatigue in VDU operators.
  • To determine if specific visual parameters can predict VDU-associated eye strain.

Main Methods:

  • A retrospective study involving 1013 VDU operators from two organizations.
  • Operators were categorized as symptomatic or asymptomatic based on a pre-examination questionnaire.
  • Visual and ocular characteristics were assessed via a full eye examination or a modified clinical screening.

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Main Results:

  • Significant differences were observed between symptomatic and asymptomatic groups in over-refraction (spherical equivalent, cylindrical) and near horizontal heterophoria.
  • Despite these correlations, no basis for establishing definitive, valid visual standards for VDU operators was identified.
  • The automatic prescription of low plus corrections was not supported by the findings.

Conclusions:

  • While some visual and ocular characteristics correlate with VDU-related eye strain, they do not provide a basis for universal visual standards.
  • Clinical judgment remains essential for assessing VDU operators due to the lack of clearly definable visual standards.
  • Further research may be needed to refine understanding and establish evidence-based guidelines for VDU use.