Testing Your Visual Acuity (VIDEO) University of Rochester This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption New research explains how your brain perceives motion, much like your GPS. Take a look at these optical illusions and test your own visual acuity. Credit Matthew Mann/University of Rochester Usage Restrictions With attribution License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.