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[Changes in visual acuity observed in VDT workers in a printing company]
H Yoshikawa1, M Yoshida, I Hara
1Department of Public Health, Kansai Medical University.
Sangyo Igaku. Japanese Journal of Industrial Health
|November 1, 1991
Summary
Ophthalmological examinations revealed that prolonged visual display terminal (VDT) work, especially in typesetters, led to significant decreases in refractive power and increased rates of severe visual acuity reduction over three years.
Area of Science:
- Ophthalmology
- Occupational Health
Background:
- Visual display terminal (VDT) use is prevalent in modern workplaces.
- Potential ocular health impacts of VDT work require investigation.
Purpose of the Study:
- To assess the longitudinal effects of VDT work on ophthalmological parameters.
- To compare ocular changes between VDT workers and control groups.
Main Methods:
- Yearly ophthalmological examinations were conducted over three years.
- Four groups were studied: VDT/key-punch workers, irregular VDT users, typesetters, and office workers.
- Subjective refractive power and naked visual acuity were primary outcome measures.
Main Results:
- All groups exhibited decreased refractive power over three years.
- Typesetters (A-2 group) showed the most significant decrease in refractive power.
- A notable increase in severe visual acuity reduction was observed in VDT workers post-introduction.
Conclusions:
- VDT work is associated with progressive changes in refractive error.
- Occupational groups with intensive VDT exposure, like typesetters, are at higher risk for visual decline.
- Regular eye examinations are crucial for VDT users to monitor and manage potential vision impairments.