King-Devick Test is an easy-to-administer test which is given on the sidelines of sporting events to aid in the detection of concussions in athletes. King-Devick Test (K-D Test) can help coaches, athletic trainers, medical professionals, and parents objectively determine whether players should be removed from games or not. As a result, King-Devick Test can help prevent the serious consequences of repetitive concussions resulting from an athlete returning to play after a head injury.

Concussions are a complex type of brain injury that is not visible on routine scans of the brain, yet are detectable when important aspects of brain function are measured. King-Devick Test (K-D Test) is a two-minute test that requires an athlete to read single digit numbers displayed on cards or on an iPad. After suspected head trauma, the athlete is given the test and if the time needed to complete the test is any longer than the athlete’s baseline test time, the athlete should be removed from play and should be evaluated by a licensed professional.