In a prospective cohort of 22 male Australian football players, the investigators evaluated the diagnostic accuracy and test–retest repeatability of the King–Devick (K–D) test for identifying sports-related concussion. With a positive likelihood ratio of 11.6 and a positive predictive value of 89%, the K–D test was shown to be an effective screening tool for identifying impaired oculomotor function, a marker for sports-related concussion.

The K–D test may help sports medicine professionals make faster decisions regarding management of sports-related concussion and player fitness on the field.

– Kathleen Freeman, OD, FAAO

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