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Saccadic eye movements among copper smelter workers.

L Glickman, J A Valciukas, R Lilis

    American Journal of Industrial Medicine
    |January 1, 1985
    PubMed
    Summary

    Copper smelter workers and lead-exposed auto workers show reduced saccade accuracy. Copper smelters over 50 had worse accuracy, linked to age and exposure, not just lead levels.

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    Area of Science:

    • Occupational Health
    • Neuroscience
    • Toxicology

    Background:

    • Occupational exposure to toxins can impact neurological function.
    • Saccade accuracy is a sensitive measure of visual-motor control.
    • Previous studies suggest lead exposure affects cognitive and motor skills.

    Purpose of the Study:

    • To compare saccade accuracy in copper smelter workers and lead-exposed automobile production workers.
    • To investigate the relationship between exposure biomarkers and saccade accuracy.
    • To examine the influence of age and exposure duration on saccade accuracy.

    Main Methods:

    • Saccade accuracy was assessed in 87 copper smelter workers.
    • Findings were compared to 52 lead-exposed automobile production workers and 52 controls.
    • Biomarkers included blood lead (Pb-B), zinc protoporphyrin (ZPP), and urinary arsenic (As-U).

    Main Results:

    • Both worker groups exhibited decreased saccade accuracy compared to controls.
    • Copper smelter workers over 50 showed lower saccade accuracy than same-aged auto workers.
    • In copper smelters, saccade accuracy was not correlated with Pb-B, ZPP, or As-U, but decreased with age and exposure duration.
    • In auto workers, saccade accuracy correlated with Pb-B and ZPP.

    Conclusions:

    • Occupational exposure in copper smelters, potentially involving complex agents beyond lead, impairs saccade accuracy.
    • Age and duration of exposure are significant factors in saccade accuracy decline for copper smelter workers.
    • Lead exposure biomarkers are associated with reduced saccade accuracy in automobile production workers.

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