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Is the driver drunk? Oculomotor sobriety testing.

E Halperin, R L Yolton

    Journal of the American Optometric Association
    |September 1, 1986
    PubMed
    Summary
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    Law enforcement uses a new eye movement test to detect drunk driving. This ocular test accurately identifies about 80% of drivers with high blood alcohol content, outperforming older methods.

    Area of Science:

    • Forensic science
    • Ophthalmology
    • Toxicology

    Background:

    • Law enforcement agencies utilize field sobriety tests to assess driver impairment.
    • Traditional tests include coordination and mental computation assessments.
    • Ocular motor function has been explored as an indicator of alcohol intoxication.

    Purpose of the Study:

    • To evaluate a novel ocular motor test for determining blood alcohol levels in suspected drunk drivers.
    • To compare the accuracy of the ocular test against traditional field sobriety tests.

    Main Methods:

    • The study involved observing ocular pursuit movements, end-point nystagmus, and the angle of lateral deviation for nystagmoid movements.
    • The test was administered and scored by law enforcement personnel.

    Related Experiment Videos

  • Suspects' blood alcohol levels were the benchmark for accuracy assessment.

    • Main Results:

    • The ocular test correctly identified approximately 80% of drivers with blood alcohol levels of 0.10% or greater.
    • The new test demonstrated higher accuracy compared to traditional coordination and mental computation tests.

    Conclusions:

    • The described ocular motor test is a potentially valuable tool for law enforcement in identifying impaired drivers.
    • Further research is needed to address potential inaccuracies in individuals with pre-existing ocular conditions like refractive errors or chronic nystagmus.