I found it particularly interesting that prolonged test times on the King-Devick Test may be indicative of silent concussions. In this regard, there is a parallel to silent so-called mini-strokes among older patients, in which visual and cognitive functions are compromised but the damage isn’t as overt as slurred speech. These patients often have no idea that they have experienced a TIA or mini-stroke. Concussions in athletes of all ages may escape detection, and routine screening done pre- and post-season may provide a better window. It also opens the window for discussion about not only return to play, but the vexing problem of the rate at which student athletes can return to school studies without cognitive overload and shut down. Such indices can also be pivotal in helping gauge the influence of vision therapy in rehabilitating visual cognitive functions, and an optimal dose-response ratio of therapy.
The accompanying video by Mayo Clinic neurologist Dr. Amaal Sterling is nicely done: