The King-Devick (K-D) Test of Rapid Eye Movements: A Bedside Correlate of Disability and Quality of Life in Multiple Sclerosis

Based on the speed of rapid number naming, the King-Devick (K-D) test captures impaired eye movements and saccades, findings that correlate with suboptimal brain function. Time scores for the K-D test are significantly higher (worse) in athletes immediately following concussion, consistent with involvement of the widely distributed visual pathways