There is a King-Devick test which has proven effective. A variety of technologies for use in instant detection of impairment on the sidelines have been developed and more are on the way.
Recent News
University of Denver Study Shows King-Devick Test in association with Mayo Clinic is an Accurate Tool for Detecting, Tracking and Measuring the Severity of Long COVID
NASCAR, Drivers Look at Cockpit Safety to Prevent Head Injuries
What to know about concussion — Before your kid gets hit
Four concussions by 21: Hutt specialist finds women take a month to recover
New Study: King-Devick Performs As Best Objective Concussion Test