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Vision Training Methods for Sports Concussion Mitigation and Management
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King-Devick and Pre-season Visual Function in Adolescent Athletes.

Katherine K Weise1, Mark W Swanson, Kimberly Penix

  • 1*OD, MBA, FAAO †OD, MSPH, FAAO ‡OD, FAAO §MPH, MD ‖MEd. ATC/L The University of Alabama at Birmingham Sports Medicine Clinic at Children's of Alabama, Birmingham, Alabama (all authors).

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|July 29, 2016
PubMed
Summary
This summary is machine-generated.

The King-Devick test shows improving speed and repeatability with age in young athletes. Vision correlates like convergence and pupil function do not impact King-Devick test scores.

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Area of Science:

  • Sports Medicine
  • Ophthalmology
  • Neurology

Background:

  • The King-Devick test (KD) is used as a sideline concussion assessment tool.
  • Limited research exists on KD test repeatability in younger athletes.

Purpose of the Study:

  • To assess the repeatability of the King-Devick test in school-aged athletes.
  • To determine if vision correlates (convergence, alignment, pupil function) affect KD baseline scores.

Main Methods:

  • A cross-sectional study involving 785 athletes undergoing pre-season physicals.
  • Included King-Devick testing (repeated) and other vision screenings (visual acuity, alignment, convergence, pupil function).

Main Results:

  • King-Devick test times improved with age, with high repeatability (ICC=0.92).
  • No significant association was found between KD times and convergence, alignment, or pupil function.
  • Variability in KD scores was greater in younger athletes.

Conclusions:

  • King-Devick test performance in junior high and high school athletes is age-dependent and becomes more repeatable with age.
  • The KD test's correlation with convergence, alignment, or pupil function is not significant.
  • Consider within-player variability for removal-from-play decisions based on KD results.