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[Visual fatigue during work associated with increased visual loading].

V Koĭcheva, V Zlateva

    Problemi Na Khigienata
    |January 1, 1983
    PubMed
    Summary
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    Visual perception declines during the workday, with reduced sensitivity and visual fatigue. These effects are more pronounced in workers over 40, highlighting the need for rest and rehabilitation strategies.

    Area of Science:

    • Occupational health
    • Visual science
    • Ergonomics

    Background:

    • Visual perception is critical for work quality and efficiency.
    • Occupational activities with high visual demands can impact visual system function.
    • Long-term studies are needed to understand these impacts.

    Purpose of the Study:

    • To systematically examine visual system alterations in workers with high visual demands.
    • To identify factors influencing visual fatigue and adaptation.
    • To determine the significance of fatigue for implementing rest and rehabilitation.

    Main Methods:

    • Clinical and functional examination of 765 workers (aged 20-55, 1-25 years of service).
    • Systematic observation over several years.
    • Assessment of visual sensitivity, clarity, and fatigue indicators.

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    Main Results:

    • Significant visual system alterations observed within a single workday.
    • Common changes include elevated electric sensitivity thresholds, reduced light/color sensitivity, and increased near point of vision.
    • Workers over 40 showed more pronounced alterations, often linked to uncorrected presbyopia and visual fatigue.

    Conclusions:

    • Visual system adaptation is optimal between ages 25-35.
    • Age significantly influences the manifestation and severity of visual function alterations.
    • Quantifying visual fatigue is crucial for effective rest and rehabilitation interventions.